Enrich ListRegistryEntries response with version metadata

[rdimitrov]

Summary

• GET /v1/registries/{name}/entries now returns title, description, createdAt, updatedAt, and position alongside the existing entryType, name, version, and sourceName.
• Brings this admin endpoint to parity (in terms of available per-version metadata) with GET /v1/sources/{name}/entries, which the admin UI already relies on for the corresponding sources view.
• Response shape stays flat (one row per version). The endpoint is intentionally unshadowed — per .claude/rules/api.md §5 — so grouping stays a UI concern.

Why

The admin UI lists all entries of a registry and needs to render title + description per entry. Those fields live on entry_version and were already selected by ListEntriesBySource; ListEntriesByRegistry was the only path that dropped them. createdAt/updatedAt/position close remaining metadata gaps between the two admin endpoints.

The upstream v0.1 consumer endpoints (/registry/{name}/v0.1/servers, /x/dev.toolhive/skills) already return description via their spec-shaped payloads — they are unchanged.

Scope

• database/queries/registry_entries.sql — extend ListEntriesByRegistry SELECT.
• internal/db/sqlc/registry_entries.sql.go — regenerated.
• internal/service/service.go — new fields on RegistryEntryInfo.
• internal/service/db/impl_registry.go — map nullable columns, same pattern as impl_source.go.
• internal/api/v1/routes_test.go — happy-path fixture + assertions cover the new fields.
• docs/thv-registry-api/* — swagger regenerated.

/v1/sources/{name}/entries and SourceEntryInfo are untouched. position is only added to the registry endpoint — it's the source's priority within a given registry (registry_source.position) and has no meaning in the source-centric view.

Test plan

• task lint-fix — clean
• task test for internal/api/v1/... and internal/service/... — green (the only failure in the full task test run was an unrelated testcontainers/docker timeout in internal/sync/writer)
• task docker-up-detached and hit the endpoint end-to-end:

  curl -s http://localhost:8080/v1/registries/default/entries
  

  Confirmed title, description, createdAt, updatedAt, position all populate from the seeded file source; /v1/sources/{name}/entries response shape unchanged.
• Reviewer: sanity-check swagger diff (docs/thv-registry-api/swagger.yaml)

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 60.57%. Comparing base (06cfce2) to head (7b9808f).

Files with missing lines	Patch %	Lines
internal/service/db/impl_registry.go	0.00%	11 Missing ⚠️
internal/db/sqlc/registry_entries.sql.go	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #754      +/-   ##
==========================================
+ Coverage   60.40%   60.57%   +0.16%     
==========================================
  Files         108      108              
  Lines       13041    10495    -2546     
==========================================
- Hits         7878     6357    -1521     
+ Misses       4610     3585    -1025     
  Partials      553      553              

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[blkt]

Are sources ok?