fix: declare the compiled contract set in the dev release manifest

`corepack pnpm dev` did not boot. Plain `vite` serves
`public/release-manifest.json` verbatim, and that hand-maintained fixture still
declared `"packages": []` after the first real contract contribution was
registered. `verifyContractSet` runs unconditionally at boot — before any
adapter is chosen, so in the default `MOCK` mode as much as in `HTTP` — saw the
build had compiled `@tech-log/studio-contract` and failed closed with
`CONTRACT_SET_PACKAGE_MISSING`. Production builds were never affected:
`scripts/generate-build-manifest.ts` derives `dist/release-manifest.json`'s
block from the same composed set.

Editing the fixture by hand is not the fix — it had already gone stale twice,
once when the package first appeared and once when the contract moved 2.0.0 ->
3.0.0, because every regeneration changes the package digest. So
`generate:tech-log-contract` now refreshes the block itself, as its last step
and through a dynamic import so it reads the canonical source it just wrote.
`generate:dev-release-manifest` does the same refresh on its own.

The composed set can also change without the contract being regenerated — a
contribution added to or removed from `installed-contract-contributions.ts`
moves it. Tying the refresh to contract generation is therefore necessary but
not sufficient; the CI gate that follows is what closes that half.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

package.json

@@ -87,6 +87,8 @@
     "check:artifact-schemas": "node scripts/generate-artifact-schemas.ts --check",
     "generate:tech-log-contract": "node scripts/generate-tech-log-contract.ts",
     "check:tech-log-contract": "node scripts/generate-tech-log-contract.ts --check",
+    "generate:dev-release-manifest": "node scripts/check-dev-release-manifest.ts --write",
+    "check:dev-release-manifest": "node scripts/check-dev-release-manifest.ts",
     "generate:supply-chain": "node scripts/generate-supply-chain.ts",
     "verify:local-evidence": "node scripts/verify-release-candidate.ts && node scripts/verify-release.ts && node scripts/verify-supply-chain-artifacts.ts && node scripts/verify-archived-local-evidence.ts && node scripts/verify-release-candidate.ts",
     "verify:promotion": "node scripts/verify-exact-promotion-bundle.ts",