release: v1.9.0 for larger watchlists and cache prewarming

[leo-mathurin]

Release v1.9.0

Promotes staging to main.

Changes

• Raise the supported IMDb watchlist and list limit to 15,000 items.
• Fetch large lists in adaptive GraphQL pages, including exact cursor-boundary requests.
• Prewarm watchlist caches after configuration saves without delaying the response.
• Coordinate prewarms and refreshes across concurrent requests and server instances.
• Handle configuration load failures, denied clipboard access, malformed manifest user IDs, and unknown frontend routes.
• Add backend and E2E coverage for success, failure, retry, concurrency, and fallback paths.

Validation

• PR feat: increase watchlist item limit and prewarm installs (STR-52) #46 CI passed lint, build, unit tests, and the full E2E suite.
• Vercel frontend and backend preview checks passed.
• A real 10,000-title cold scrape completed in 44.1 seconds while configuration returned in 962 ms.

Release notes

• CI will bump the version from 1.8.0 to 1.9.0 after merge because this release contains a feat commit.
• Tracks STR-52.

[vercel]

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Project	Deployment	Actions	Updated
stremlist-backend	Ready	Preview	Sep 1, 2026 2:57pm UTC
stremlist-frontend	Ready	Preview	Sep 1, 2026 2:57pm UTC

[greptile-apps]

Greptile Summary

The release increases supported IMDb list sizes and adds adaptive pagination, asynchronous cache prewarming, and database-backed coordination across instances.

• Raises list processing limits to 15,000 items and handles cursor boundaries.
• Schedules cache prewarming after configuration saves.
• Adds generation-based leases for concurrent prewarm requests.
• Improves frontend and manifest fallback handling and expands automated coverage.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/backend/src/services/watchlist-prewarm.ts	Adds bounded-concurrency cache prewarming with database-backed lease and generation coordination.
supabase/migrations/20260901160000_queue_watchlist_prewarm_requests.sql	Introduces durable request generations and token-guarded lease completion for cross-instance coordination.
apps/backend/src/services/imdb-scraper.ts	Adds adaptive GraphQL pagination to support lists containing up to 15,000 titles.
apps/backend/src/routes/api.ts	Schedules non-blocking cache prewarming after successfully saving configuration.
apps/frontend/src/App.tsx	Adds fallback routing for unknown frontend paths.

_{Reviews (4): Last reviewed commit: "fix(backend): queue concurrent prewarm r..." | Re-trigger Greptile}

[leo-mathurin]

@greptile review

[leo-mathurin]

@greptile review

[leo-mathurin]

@greptile review