Wave 5b-L: zero phpstan absorbed errors in LiveTv + Transcoding tails

[detain]

Summary

Drives baselined phpstan level-9 errors to 0 across the LiveTv + Transcoding tail cluster (89 baselined errors removed):

File	Errors removed
src/LiveTv/GuideManager.php	24
src/LiveTv/ChannelManager.php	21
src/LiveTv/LiveTvManager.php	5
src/Media/Transcoding/TranscodeManager.php	18
src/Media/Streaming/QualitySelector.php	11
src/Media/Transcoding/EncodingHelper.php	10

Whole-tree no-baseline error count: 720 → 631 (-89). Master-CI (phpstan with baseline): [OK]. phpstan-baseline.neon: 3163 → 2888 lines (-275 lines, 55 entries removed).

Real bugs uncovered while tightening types

• GuideManager::cleanupOldPrograms() referenced a non-existent $db->affected_rows on Workerman\MySQL\Connection. Replaced with the documented query() return value for DELETE (rowCount as int).
• GuideManager cache stored two incompatible value shapes under one property. Split into $programCache and $channelCache so static types match what each path actually returns.
• TranscodeManager imported a non-existent Phlex\Common\Database\Connection; switched to the real Workerman\MySQL\Connection.
• TranscodeManager::startTranscode() never honoured its $maxConcurrentTranscodes limit. Now enforced before scheduling any new job; $segmentDir and $maxConcurrentTranscodes exposed via getters (previously written-only).
• TranscodeManager::getActiveTranscodeCount() inspected a nonexistent 'status' key on the active-job map; tightened to count the map directly.
• QualitySelector profile defaults were applied as a top-up via array_merge, leaving user-supplied partial profiles with missing required keys at runtime. Added normalizeProfile() so the constructor / registerProfile() always materialise a full profile shape.

Hydration helpers reused

• Phlex\LiveTv\Dto\{RowAccess, RowQuery} (PR Wave 5a-D: phpstan zero on LiveTv + HdHomeRunTunerDriver test fix #88)
• Phlex\Common\Util\RowMap (PR Wave 5a-G: phpstan zero — tail sweep + test fatal fix #90)

Part of Wave 5b per HANDOFF_WAVE5_PLUS.md.

Test plan

• ./vendor/bin/phpstan analyze on the 6 scope files with no-baseline config → [OK]
• ./vendor/bin/phpstan analyze src/ --level=9 (with baseline) → [OK]
• ./vendor/bin/phpunit tests/unit/LiveTv/{ChannelManagerTest,GuideManagerTest,LiveTvManagerTest}.php tests/unit/LiveTv/Dto tests/unit/Media/Streaming/QualitySelectorTest.php → 56 tests pass
• ./vendor/bin/phpunit tests/unit/Media/Transcoding/{Subtitles,FfmpegRunnerTest.php,Hwaccel} → 164 tests pass
• ./vendor/bin/phpcs --standard=PSR12 src/LiveTv/ src/Media/Transcoding/ src/Media/Streaming/ → 0 errors
• php -l on every modified file

🤖 Generated with Claude Code

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