v0.96.67

feat: chunked IVF recording with round-robin disk management

Daemon-level debug recording following the Capsper pattern. When
ZEROCAST_RECORD_DIR is set, each app share session records encoded
AV1 frames to chunked IVF files with structured diagnostic logs.

New: src/session_recorder.zig

• 10-minute chunks, 600MB total disk budget
• Round-robin slot naming (000.ivf/000.log, 001.ivf/001.log, etc.)
• Per-chunk .log with session metadata, pipeline timings, events
• Auto-prune oldest chunks when over budget

Modified:

• encoder.zig: optional recorder, writes frames + timing summaries
• app_share.zig: creates recorder from config.record_dir, logs events
• daemon.zig: reads ZEROCAST_RECORD_DIR env, passes to AppShareConfig
• ivf.zig: added initDir() for dir-relative file creation
• nvenc.zig: removed maxEncodeWidth/Height (broke AV1 P-frame decode)
• install.sh: prompts for recordings, injects env into systemd service
• zerocast-apply-update.sh: wipes recordings on version update

Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com