v1.3.1

Fixes and performance improvements

• Recover TikTok URL resolution after proxy TLS failures exhaust an HTTP connection pool, without interrupting other active requests.
• Bound URL resolution, including duplicate-request waits, to a configurable 12-second deadline. Stop retrying invalid links and report upstream timeouts and local capacity failures accurately.
• Cache successful URL resolutions for 10 minutes and share concurrent failures only with existing waiters, allowing new requests to retry immediately.
• Reject oversized Telegram video/audio downloads before reading their bodies when sizes are known; enforce a combined budget for separate tracks and check the final remuxed output.
• Overlap thumbnail preparation with media connection/download work and bound optional thumbnail waits.
• Clean up cancelled downloads, queued concurrency slots, and FFmpeg processes promptly.
• Add structured diagnostics for resolver recovery and missing media assets.

Configuration and compatibility

• URL_RESOLVE_TIMEOUT_SECONDS defaults to 12.
• URL_RESOLVE_POOL_TIMEOUT_SECONDS defaults to 1.
• TIKTOK_RESOLUTION_CACHE_TTL_SECONDS defaults to 600.
• Pool-capacity failures return HTTP 503 (service_busy); resolution timeouts return HTTP 504.
• Existing Telegram upload limits now apply earlier in the download process. Oversized videos are not automatically downgraded.

Validation

• 161 non-live tests passed, including a local TLS proxy reproduction and failure-sharing regression coverage.
• Ruff lint and formatting checks, strict mypy checks, and lockfile validation passed.

Full changes: v1.3.0...v1.3.1