feat(miner-deployment): add docker-compose.miner.yml for AMS fleet mode

[davion-knight]

Adds packages/gittensory-miner/docker-compose.miner.yml so operators run the miner as a long-lived worker instead of a hand-assembled docker run (#5177). Built on the existing package Dockerfile.

Fixes vs the prior submission (#5266, closed on review)

• Compose-precedence footgun (the closing defect): removed the hardcoded GITTENSORY_MINER_CONFIG_DIR from the compose environment block. Compose's environment silently overrides env_file, so advertising that var as an env-file override was a dead footgun. The state dir is now simply fixed at /data/miner (the Dockerfile default + the volume mount) and documented as such — no contradiction. Removed the matching line from .env.example.
• Secret-file hygiene: added .gittensory-miner.env to .gitignore (keeping the committed .example), since the whole premise is that the filled-in file is never committed. Verified with git check-ignore.

Contents

• docker-compose.miner.yml — a miner service built from the Dockerfile (monorepo-root context), command: ["run"], restart: unless-stopped, SQLite state on a named miner-data volume, credentials via env_file (nothing overridable pinned in environment).
• .gittensory-miner.env.example — empty (scanner-safe) placeholders; .gitignore protects the real copy.
• DEPLOYMENT.md — Docker Compose section: up usage + --scale with the honest SQLite-collision caveat and per-worker isolation patterns (separate compose projects / distinct config dirs; k8s StatefulSet for built-in isolation).

Validation

• test/unit/miner-docker-compose.test.ts (5 tests): service built from the package Dockerfile + named volume + unless-stopped; credentials via env-file with a regression assertion that GITTENSORY_MINER_CONFIG_DIR is NOT pinned in environment (the closing defect); env example ships only empty placeholders; and .gitignore protects the real env file while keeping the example. The existing miner-deployment-doc.test.ts still passes.
• YAML parses; tsc clean; prettier-clean; no hardcoded credentials. Static packaging only — no src/** logic touched.

Closes #5177

[superagent-security]

Superagent didn't find any vulnerabilities or security issues in this PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.37%. Comparing base (d56f4ec) to head (fc165a1).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5299   +/-   ##
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  Coverage   94.37%   94.37%           
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  Files         474      474           
  Lines       40128    40128           
  Branches    14631    14631           
=======================================
  Hits        37869    37869           
  Misses       1583     1583           
  Partials      676      676           

Flag	Coverage Δ
shard-1	46.28% <ø> (-0.15%)	⬇️
shard-2	34.74% <ø> (+0.03%)	⬆️
shard-3	30.96% <ø> (-1.11%)	⬇️
shard-4	32.91% <ø> (+0.81%)	⬆️
shard-5	33.25% <ø> (-0.44%)	⬇️
shard-6	45.43% <ø> (+0.59%)	⬆️

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✅ Gittensory review result - approve/merge recommended

_{Review updated: 2026-07-12 13:24:55 UTC}

5 files · 2 AI reviewers · no blockers · readiness 100/100 · CI green · unknown

✅ Suggested Action - Approve/Merge

• safe to merge

Review summary
Adds docker-compose.miner.yml plus an env-file example, .gitignore entries, and a structural test suite for a long-lived AMS fleet-mode miner worker, explicitly fixing the prior submission's environment/env_file precedence footgun by removing the hardcoded GITTENSORY_MINER_CONFIG_DIR override. The compose file, env example, gitignore, and tests are internally consistent, the state-dir fix is real (verified by the regression test asserting the var is absent from `environment`), and DEPLOYMENT.md is updated with matching usage and an honest SQLite multi-worker caveat. Diff is scoped tightly to the stated fleet-mode compose feature and closes #5177.

Nits — 5 non-blocking

• docker-compose.miner.yml:22 hardcodes `image: gittensory-miner:latest` alongside a `build:` block — with multiple isolated compose projects (per the doc's own -p miner-1/-p miner-2 pattern) they'll all tag/reuse the same local image name unless each project builds and retags independently; worth a comment or `image: gittensory-miner:${TAG:-latest}` if that's a real concern for the documented scaling pattern.
• test/unit/miner-docker-compose.test.ts:20-24 asserts `environment` doesn't contain secret-like keys via a `JSON.stringify` regex on `miner.environment ?? {}` — this passes trivially since the compose file never defines `environment` at all, so the test mostly just double-checks the YAML doesn't add one later rather than testing meaningful current behavior (still fine as a regression guard, but the coverage is thinner than the comment implies).
• Consider documenting in DEPLOYMENT.md or the compose file comment what `image: gittensory-miner:latest` implies for the `-p miner-1`/`-p miner-2` isolated-worker pattern already documented, since each project would otherwise share/overwrite the same tag.
• nit: packages/gittensory-miner/DEPLOYMENT.md:13 still says fleet mode scales horizontally by adding containers, but the new Compose section correctly says multiple containers sharing one volume will contend/corrupt, so change the table language to mention isolated state per worker.
• nit: packages/gittensory-miner/DEPLOYMENT.md:62 still says launch additional containers with the same volume for parallel attempts, which contradicts the new SQLite collision caveat at packages/gittensory-miner/DEPLOYMENT.md:82; update that older bullet to require separate volumes/config dirs.

Signal	Result	Evidence
Code review	✅ No blockers	2 reviewers, synthesized
Linked issue	✅ Linked	#5177
Related work	✅ No active overlap found	No same-issue or scoped active PR overlap found.
Change scope	✅ 20/20	Low review scope from cached public metadata (1 linked issue).
Validation posture	✅ 25/25	PR body includes validation/test evidence.
Contributor workload	✅ 10/10	Author activity: 117 registered-repo PR(s), 85 merged, 2 issue(s).
Contributor context	✅ Confirmed Gittensor contributor	davion-knight; Gittensor profile; 117 PR(s), 2 issue(s).
Gate result	✅ Passing	No configured blocker found.
Improvement	⚠️ ℹ️ Insufficient signal	risk: clean · value: insufficient-signal — Nothing measurable for the structural-improvement analyzers on this PR (e.g. no code files changed). LLM value judgment: moderate — The PR delivers a focused, tested operator-facing compose workflow that fixes a concrete precedence defect from the prior closed submission and is well-scoped to the linked issue #5177.

Review context

• Author: davion-knight
• Role context: outside_contributor
• Public audience mode: oss maintainer
• Lane context: Repository is configured for direct PR review.
• Public profile languages: not available
• Official Gittensor activity: 117 PR(s), 2 issue(s).
• PR-specific overlap: none found.

Contributor next steps

• Keep the PR focused and include validation evidence before maintainer review.

Signal definitions

• Related work = same linked issue, overlapping active PRs, or title/path similarity.
• Change scope = cached public metadata such as size labels, draft state, and review-burden hints.
• Validation posture = whether the PR provides enough public validation/test evidence for maintainer review.
• Contributor workload = public contributor activity and cleanup pressure, not a repo-wide quality failure.
• Contributor context = public GitHub/Gittensor identity context; non-Gittensor status is not a blocker.

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_{🟩 Safe / merged · 🟦 Advisory · 🟨 Held for review · 🟥 Blocked / closed}

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Gittensory approves — the gate is satisfied and CI is green.