fix(ci): repair lanes broken by retrieval disclosure commit

[devin-ai-integration]

Summary

• Fixes the CI lanes broken on master by 20175c2e6d feat(retrieval): disclose route, churn, misses, and co-change and f4b8918541 feat(index): report accurate generic ambiguity census: workspace Clippy (match_bool + items_after_test_module), Dashboard check:embedded (stale plugin/chatgpt-extension/embedded/server.mjs after the SDK regeneration), Linux core-contracts (CURSOR_PLUGIN_SKILLS missing the new routing-tracedecay bundled skill), and Linux core-storage (partitioned_codec_has_stable_bytes_and_round_trips — the ambiguity census changed the sealed manifest bytes without a SEALED_GENERATION_FORMAT_REVISION bump or a PARTITIONED_FORMAT_STATE_DIGEST update).

Motivation

Every open PR's merge-ref CI currently fails these lanes on master. The failures are unrelated to the PRs themselves and reproduce on origin/master a439cabecc.

Changes

• crates/tracedecay-mcp/src/handlers/analysis/hotspots.rs: match churn_available { true => …, false => … } → if/else (clippy's suggested rewrite; behavior unchanged).
• crates/tracedecay-agent-hosts/src/agents/cursor.rs: add "routing-tracedecay" to CURSOR_PLUGIN_SKILLS — plugin/skills/routing-tracedecay/SKILL.md is model-invocable (no disable-model-invocation), so the bundled-skill index test requires it.
• plugin/chatgpt-extension/embedded/server.mjs: rebuilt via pnpm run build in plugin/chatgpt-extension so the embedded bundle matches the regenerated @tracedecay/sdk.
• crates/tracedecay-code-index/src/production/generation_statistics.rs: ambiguous_name_drops gains skip_serializing_if = "Option::is_none" (None means "not measured" and stays absent on the wire, matching the decode-compat test); mod tests moved below production items for items_after_test_module.
• crates/tracedecay-code-index/src/production/sealed_codec.rs: SEALED_GENERATION_FORMAT_REVISION_V1 20 → 21 — the census field changes the canonical manifest payload, and repo convention pairs a serialized-shape change with a revision bump (19 → 20 did the same).
• crates/tracedecay-code-index/tests/code_index_suite/production_orchestration.rs: PARTITIONED_FORMAT_STATE_DIGEST pinned to the revision-21 canonical bytes.

Test plan

• cargo clippy --workspace --all-targets -- -D warnings — clean
• cargo test -p tracedecay-code-index --test code_index_suite — 205/205 (incl. partitioned_codec_has_stable_bytes_and_round_trips)
• bash scripts/require-exact-test.sh cargo test -p tracedecay-agent-hosts --lib agents::cursor::tests::session_context_skill_index_matches_bundle_skills -- --exact — 1 passed
• pnpm run check:embedded (in plugin/chatgpt-extension) — "embedded artifacts are current"
• cargo fmt --all -- --check — clean

Checklist

• No secrets, credentials, or .env files included
• Breaking changes documented (sealed generation format revision bump forces a one-time rebuild, per the existing superseded-revision path)

Link to Devin session: https://app.devin.ai/sessions/1f0d1bf1427c4efcabbcdbd01e63cebc
Open in Devin Desktop: https://app.devin.ai/desktop/session/1f0d1bf1427c4efcabbcdbd01e63cebc?variant=devin
Requested by: @ScriptedAlchemy

---

[devin-ai-integration]

I'll fix CI failures and address comments from users with write access. I'll skip comments containing "(aside)".

• Disable automatic comment, CI, and merge conflict monitoring

[changeset-bot]

⚠️ No Changeset found

Latest commit: 0e26ada

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.