docs(social): mark the Social module's relocation to MeshWeaver.SocialMedia (task #63) — double-ship, platform copy is master until the flip

[rbuergi]

Task #63 (modularization program): the Social module relocated to Systemorph/MeshWeaver.SocialMedia (PR #31) — the SocialMedia package is now the first MIXED package (node content + compiled module), with the satellite's CI building the module Release -warnaserror against a pinned platform ref and packing the bundle via the reusable module-pack lane (#1664 Slice B / #1673), bundle closure + manifest asserted in CI.

This platform PR is deliberately NOT the source delete — it is the double-ship marker that keeps the two copies from diverging:

• src/MeshWeaver.Social/README.md — records the relocation state, the "platform copy is the MASTER until the flip; mirror .cs verbatim" rule, and the exact flip blockers a future delete-PR must resolve:
  1. Memex.Portal.Shared compiles against PlatformCredential (ApiCredentialNodeType stays host-side by design) + the ships-the-bits ProjectReference — PR feat(modules): all remaining flippable service modules leave the host build graph (#1644 step 2, task #66) #1681's "not flippable" verdict;
  2. in-mesh callers of SocialExtensions.AddSocial (at least samples/Graph/Data/Doc/DataMesh/SocialMedia/{Post,Profile}.json config lambdas; NodeType compilation sees only TPA — the fix(approvals): restore the legacy MeshWeaver.Graph surface — the ci.3961 bake regression #1683/fix(approvals): the legacy surface is COMPLETE — ci.3971 still regressed on the uncovered classes #1685 AddApprovals breakage class); a fresh content/ samples/*/Data + node-JSON + live-mesh sweep is mandatory before any symbol is deleted;
  3. task Delete test placeholder for Remove horizontal scrollbar in Recently Viewed section on title page #74's satellite-bundle rollout (until then the registry's thin-lane modules/MeshWeaver.Social/ is empty by construction and serves nothing).
     It also records what the flip changes (project + Memex.Portal.Shared reference + @(MeshModule) entry removed) and what STAYS (Modules:Assemblies entries — the runtime then loads the landed module from modules/).
• memex/MeshModulesPublish.targets — one comment pointing the "Social not flippable" note at the relocation state.

What's New: skipped — docs-only marker, no user-visible change (pure relocation; the module keeps shipping identically via the thin lane).

Verification: sources in the satellite are byte-identical to this repo's copies (cmp over all 13 .cs); dotnet build src/MeshWeaver.Social -c Release -warnaserror → 0 errors; targets file XML-validated; branch rebased on current main (post-#1687).

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Marks the MeshWeaver.Social module’s ongoing relocation to the MeshWeaver.SocialMedia satellite repo by documenting the double-ship contract (platform copy is authoritative until the flip) and pointing future delete/flip work at the known blockers.

Changes:

• Expanded src/MeshWeaver.Social/README.md to document relocation status, double-ship rules, and flip blockers.
• Added a clarifying note in memex/MeshModulesPublish.targets pointing maintainers to the relocation doc.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/MeshWeaver.Social/README.md	Adds relocation/double-ship guidance and enumerates flip blockers to prevent accidental divergence or premature deletion.
memex/MeshModulesPublish.targets	Updates the “not flippable” comment to reference the relocation state and the authoritative README.

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[github-actions]

Test Results (shard 0)

919 tests   918 ✅  10m 51s ⏱️
 10 suites    1 💤
 10 files      0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results (shard 3)

   11 files     11 suites   5m 3s ⏱️
2 197 tests 2 006 ✅ 191 💤 0 ❌
2 566 runs  2 375 ✅ 191 💤 0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results (shard 4)

1 606 tests   1 600 ✅  7m 30s ⏱️
   11 suites      6 💤
   11 files        0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results (shard 5)

1 371 tests   1 370 ✅  6m 14s ⏱️
   11 suites      1 💤
   11 files        0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results (shard 1)

2 164 tests   2 061 ✅  7m 30s ⏱️
   11 suites    103 💤
   11 files        0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results (shard 2)

2 447 tests   2 443 ✅  7m 24s ⏱️
   11 suites      4 💤
   11 files        0 ❌

Results for commit 8bbfe48.

[github-actions]

Test Results

    65 files      65 suites   44m 34s ⏱️
10 704 tests 10 398 ✅ 306 💤 0 ❌
11 073 runs  10 767 ✅ 306 💤 0 ❌

Results for commit 8bbfe48.