chore: prepare Server 1.8.1

[Priveetee]

Summary

• prepare Server version 1.8.1
• improve provider playback, BiliBili range reuse and NicoNico media routing
• add profile accounts, service-aware recommendations and notification delivery
• keep provider media behind expiring handles and preserve request cancellation
• refresh the PipePipeExtractor integration

Production behavior

Playback and provider media remain behind the Server API boundary. Profile-scoped data, recommendations and notifications follow the active account profile, while provider media handles expire independently of upstream URLs.

Deployment requirements

Publish the Server 1.8.1 image from main and pin the production server service to its immutable digest. The profile migration is additive and must run through the normal startup migration path. Preserve the existing database volume and configuration as the rollback point.

Runtime verification

• /api/health and /api/instance report Server 1.8.1 and the release revision.
• /api/progress/batch and profile endpoints return bounded responses.
• Representative BiliBili, NicoNico and YouTube playback bootstrap successfully.
• Existing authentication and notification flows remain healthy.

Tests

• ./gradlew test
• ./gradlew check
• ./gradlew shadowJar
• OpenAPI and JaCoCo validation through CI
• git diff --check

Rollback

Restore the previous Server image digest and submodule revision, then recreate only the typetype-server service. Keep the additive migration data intact unless the documented rollback procedure requires database restoration.