fix(player): pick up AetherEngine's TrueHD Atmos sync fix

[Quick104]

Problem

TrueHD Atmos played 42.7 ms ahead of the video. AetherEngine's APAC bridge dropped the encoder's 2048 frames of priming, and AVFoundation removes those frames again on playback, so every session ran early, at load and after every seek.

Solution

Silo-Server/AetherEngine#8 keeps the priming packets. This PR moves the AetherEngine pin in project.yml, Package.resolved, THIRD_PARTY_NOTICES.md and the bundled README.txt to its merge commit on the engine's main branch, a02975ed.

Validation

• SiloTV builds for the tvOS Simulator against the PR head 455bcd6 (CODE_SIGNING_ALLOWED=NO). The merge commit a02975ed has the same source tree.
• Engine side (details in AetherEngine#8): AVPlayer over HLS on macOS 27 placed a test click 42.7 ms early with the old stamping, at the start, after a seek and after a restarted encoder. With the fix it matches an ALAC reference in all three.
• Not yet checked on Apple TV hardware. After this merges, a TestFlight build on an Apple TV into an Atmos receiver should show TrueHD Atmos titles back in lip sync.

Validation tasks: none. No passed v1.0 case covers TrueHD Atmos playback.

AI disclosure: written with Claude Opus 5.5 (claude-opus-5-5) in Claude Code. No other AI tooling was used.

🤖 Generated with Claude Code

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 8eb8125 and 1b57bed.

⛔ Files ignored due to path filters (1)

• iosApp/Silo.xcodeproj/project.xcworkspace/xcshareddata/swiftpm/Package.resolved is excluded by !**/Package.resolved

📒 Files selected for processing (3)

• THIRD_PARTY_NOTICES.md
• iosApp/Resources/OpenSourceLicenses/README.txt
• iosApp/project.yml

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[macroscopeapp]

Approvability

Verdict: Approved at 1b57bed

Macroscope's review found this PR approvable — This is a tightly scoped dependency pin and provenance update that imports a specific TrueHD Atmos timing fix, affecting only the existing opt-in Atmos rendering path while leaving default and non-Atmos playback unchanged. The upstream correction has targeted timestamp, muxing, and AVFoundation coverage, with no broader capability, schema, infrastructure, or sensitive-area changes.

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