refactor(mcp): rename local MCP tool names to loopover_ with deprecated aliases

[JSONbored]

Summary

Introduces loopover_-prefixed primary names for all 37 stdio MCP tools in packages/gittensory-mcp, with the old gittensory_-prefixed names kept alive as thin, fully-working aliases (same handler, deprecated-marked description) for one full minor-version deprecation cycle. Server now registers 74 tools total; calling by either name produces byte-identical behavior.

registerToolWithLegacyAlias() is the single DRY registration path — every call site converted mechanically, no duplicated handler logic. The CLI's own gittensory-mcp tools listing reads from the same descriptor array, so it stays in lockstep with the live server automatically.

Deliberately unchanged

• The "gittensory-local" McpServer identifier itself — package/binary identity, not an individual tool name, closer to the still-blocked npm package rename (Rename npm workspace packages #4769).
• src/mcp/server.ts's separate Worker-hosted MCP surface — a distinct package per the issue's own "local MCP package" framing.
• AGENT_PROFILES' prompt-guidance strings — a different, test-protected data surface, not tool identifiers (renaming would break mcp-cli-basics.test.ts's verbatim assertions, some of which reference aspirational tool names that were never real).

Test plan

• New test/unit/mcp-tool-rename-aliases.test.ts (11 tests) covers 6 tools across distinct categories (API GET/POST, no-arg, path-param, pure-local, Zod-validated output), asserting old/new name calls produce .toEqual() results; also asserts exactly 74 tools discoverable and every alias description matches the deprecation-notice pattern.
• Full local regression (61 files, 496 tests) — all pre-existing old-name-calling tests pass unmodified.
• Independent spot-check of 3 additional tools not covered by the new test file — byte-identical old/new behavior confirmed.
• npm run build:mcp, npm run test:mcp-pack, npm run typecheck, npm run command-reference:check, npm run docs:drift-check — all clean.
• Full npm run test:ci gate green (782 files / 15292 tests after rebase).
• Deprecation notice text spot-checked directly via gittensory-mcp tools --json output, not just trusted from code.

Closes #4775.

[superagent-security]

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

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	gittensory-ui	8e0f540	Commit Preview URL Branch Preview URL	Jul 13 2026, 05:03 AM

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.91%. Comparing base (de9e07a) to head (8e0f540).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5554   +/-   ##
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  Coverage   94.91%   94.91%           
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  Files         570      570           
  Lines       45325    45325           
  Branches    14675    14675           
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  Hits        43020    43020           
  Misses       1571     1571           
  Partials      734      734           

Flag	Coverage Δ
shard-1	44.15% <ø> (ø)
shard-2	35.74% <ø> (+0.01%)	⬆️
shard-3	32.18% <ø> (+0.08%)	⬆️
shard-4	31.06% <ø> (-0.10%)	⬇️
shard-5	32.89% <ø> (ø)
shard-6	44.12% <ø> (ø)

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