chore: release v0.4.45

[jrusso1020]

Release v0.4.45 — patch bump of all @hyperframes/* packages (and hyperframes CLI) from v0.4.44.

Merging this PR triggers the publish workflow, which tags v0.4.45 and publishes to npm under the latest dist-tag.

Changes since v0.4.44

Render robustness (#627)

• fix(engine): wait for first frame decode + drop B-frames so renders play in every player (0e541673) — readyState >= 2 on <video> readiness checks (was >= 1) so slow-decoding clips don't paint a black first frame; -bf 0 for libx264/nvenc/qsv/vaapi h264 paths to eliminate negative-DTS freezes in VS Code preview, several browser <video> impls, and some HW decoders.
• fix(engine,producer): URL-clamp sub-comp src paths and warn on silent extraction misses (2f96d5c7) — path.join(projectDir, "../assets/foo") previously escaped the project root and silently froze sub-comp <video> at frame 0; now mirrors browser-style .. clamping with a stderr warning on extraction misses.
• fix(engine): detect VP9 alpha tag case-insensitively in ffprobe (b836941f, 39bc3749, 6fb782fc) — newer libavformat builds (and our own hyperframes remove-background) write the alpha sidecar tag as ALPHA_MODE (uppercase), which we previously misclassified as no-alpha. Default to codec-based alpha capability when the tag is missing.
• fix(engine,cli,producer): address PR fix: render robustness — sub-comp src paths, alpha tag case, encoder + matter improvements #627 review feedback (f4ecf969) — extend -bf 0 to GPU h264 paths, detect mid-path .. traversal in sub-comp sources, dedupe stderr warnings, replace startsWith("/") with isAbsolute() for Windows compatibility in the HDR probe path.

remove-background quality (#627)

• fix(cli): correct sharp 3-channel mask + BT.709 + quality presets in remove-background (688052d3).
• docs(remove-background): document compositing patterns, pitfalls, and broaden framing from avatar-specific to any person video (5fca4bec, b8b82fa8).

Test infrastructure

• fix(producer): sample PSNR checkpoints from common duration of rendered + snapshot (7d1d8ead) — symmetric PSNR comparison should always sample within the duration both videos cover; previously the harness used the rendered duration alone, which could land the last checkpoint on a frame that didn't exist in the snapshot when encoder/mux flags shifted container metadata duration. Repaired the regression run after the encoder change above.

Skills (does not ship to npm)

• refactor(skills): split asset preprocessing out of hyperframes-cli into a new hyperframes-media skill (refactor(skills): split asset preprocessing out of hyperframes-cli #619) — TTS / transcribe / remove-background guidance moved out of the CLI dev-loop skill so agents auto-load only what's relevant to the task.

All commits since v0.4.44 are fixes or internal changes — no public API changes.

[jrusso1020]

Closing — pushing version bump directly to main per release process.