Follow-up to #99.
## Why
Evicting or deleting a local RPM removed the \`local_files\` row but left its \`rpm_metadata\` behind. Since generated repodata is built from \`rpm_metadata\`, \`primary.xml\` kept advertising a package that no longer exists, producing 404s for clients that tried to fetch it.
## Changes
- Add \`PostDeleteHook\` and \`MetadataDeleter\` provider interfaces (symmetric to the existing \`PostUploadHook\`/\`MetadataStore\`), plus a \`DeleteRPMMetadata\` DB method.
- Implement \`AfterDelete\` in the RPM provider to drop the metadata row for the deleted file.
- Route both local delete paths — the new \`evictLocal\` and the existing files handler's \`remove\` — through a shared \`deleteLocalFile\` helper that removes the file then runs the provider's post-delete hook. Non-RPM providers have no hook, so nothing changes for them.
- Cover the cleanup with a dockerised test.
Reviewed-on: #100
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>
## Why
Local repos store uploaded files in the \`local_files\` table, whereas remote/proxy repos cache into the \`artifacts\` table. The shared **Cached Objects** page always queried the artifacts table via \`/api/v2/remotes/{name}/objects\`, so files uploaded to a local repo (e.g. an internal RPM) were fully stored and servable but showed as **0 objects** in the UI.
## Changes
- Add \`ListLocalArtifacts\`, joining \`local_files\` with \`blobs\` and returning \`models.Artifact\`-shaped rows (size from the blob; access/fetch counters zero and timestamps derived from \`created_at\`, since local files track no access).
- Add \`LocalRoutes\` to the objects handler: \`listLocal\` reads \`local_files\`, \`evictLocal\` deletes via \`DeleteLocalFile\`. Extract shared page/per_page parsing into \`pageBounds\`.
- Mount \`/api/v2/locals/{name}/objects\` (GET + DELETE) in the server.
- Add \`listLocalObjects\`/\`evictLocalObject\` to the UI client and route the Objects page to them when viewing a local repo.
- Cover the listing and eviction paths with a dockerised test.
## Notes
Generated \`repodata/*\` files are not listed — they are produced on the fly from \`rpm_metadata\` and never stored in \`local_files\`, which matches how the repo serves them.
Reviewed-on: #99
Co-authored-by: Ben Vincent <ben@unkin.net>
Co-committed-by: Ben Vincent <ben@unkin.net>
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