Shared HLS cache session feature and aligns the runtime, cache, provisioning, recovery, custom-response, and documentation paths with the new shared-session model.
* - Refactored Shared-Stream hot path from Arc<Bytes> to Bytes (leveraging internal reference counting).
- Switched Metadata Trigger deduplication from Arc<Mutex<HashSet<_>>> to Arc<DashSet<_>> to reduce lock contention.
- Eliminated expensive key cloning in the InputMetadataUpdatesCompleted handler.
- Changed active_target_inputs to HashSet<Arc<str>> to avoid per-event to_string() allocations.
- Implemented bounded Cleanup-Queue (switched from unbounded to mpsc::channel(4096)) with a dedicated overflow path (try_send + async flush) to prevent uncontrolled memory growth.
- Optimized by_provider storage by switching from Vec<(addr, alloc_id)> to HashSet<(addr, alloc_id)>, reducing removal complexity from $O(n)$ to $O(1)$ average.
- Optimized ActiveConnectionInfo data layout by reordering fields (large fields first) to minimize padding and improve cache efficiency.
* Improve shared-stream reliability and align docs
- make shared connection registration fallible with rollback on failure
- guard shared broadcaster startup behind successful subscription
- optimize shared stream/provider key maps to Arc<str>
- add Tokio macros feature for runtime and dev dependencies
- harden build_resources.sh with fail-fast ffmpeg error handling
- clarify StreamError display messages with variant context
- sync README stream/custom-response sections with current behavior
* low_priority_preempted stream
* Keep custom TS timestamps monotonic across loops
- advance timestamp offset by stream duration on buffer wrap
- avoid resetting PTS/DTS to zero each cycle
- prevents players from treating looped custom streams as ended/corrupt
* low_priority_preemption custom video stream fix
* inc_version uses now main toml file
* Fixed some coderabbit issues
* Optimized build
* timeout secs for custom video response
* init custom video timeout on mode switch
* terminate immediately when custom video buffer is missing
* add provisioning missing-custom timeout regression test
* add missing-custom termination tests for all custom modes
* fix ts continuity handling for discontinuity and adaptation-only packets
* fix ts loop duration estimation to use min/max timestamps
* harden pes timestamp patching and normalize pid cc sequence
* Resource ffmpeg creation without B-Frames and short GOPs
* Discontinuity patch for transport stream buffer
* grace hold stream is now default true
* streaming fixes
