chore(deps): patch Dependabot security advisories (esbuild, qs, uuid, yaml, js-yaml, babel, otel, rembg) (#257)

Resolve the actionable Dependabot alerts via pnpm overrides (for transitive deps) and a Python pin bump.

- pnpm overrides: esbuild >=0.28.1 (the lone high-severity alert), @babel/core >=7.29.6, @opentelemetry/core >=2.8.0, js-yaml >=4.2.0, qs >=6.15.2, uuid >=11.1.1, yaml >=2.8.3
- rembg 2.0.62 -> 2.0.75 in requirements.txt and requirements-gpu.txt

Verified: pnpm install, typecheck, lint, and full build all pass.

NOT included: the astro advisory requires Astro 5 -> 6 (a major, breaking framework upgrade), which warrants its own migration PR rather than a security bump.

packages/ai/python/requirements-gpu.txt

@@ -1,4 +1,4 @@
-rembg==2.0.62
+rembg==2.0.75
 realesrgan==0.3.0
 paddleocr==2.9.1
 paddlepaddle-gpu==3.0.0

packages/ai/python/requirements.txt

@@ -1,4 +1,4 @@
-rembg[cpu]==2.0.62
+rembg[cpu]==2.0.75
 realesrgan==0.3.0
 paddleocr[doc-parser]>=3.4.0,<3.5.0
 paddlepaddle>=3.0.0,<3.1.0