chore(deps)(deps): Bump chromadb from 1.3.7 to 1.4.0

Bumps [chromadb](https://github.com/chroma-core/chroma) from 1.3.7 to 1.4.0.
- [Release notes](https://github.com/chroma-core/chroma/releases)
- [Changelog](https://github.com/chroma-core/chroma/blob/main/RELEASE_PROCESS.md)
- [Commits](chroma-core/chroma@1.3.7...1.4.0)

---
updated-dependencies:
- dependency-name: chromadb
  dependency-version: 1.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -50,7 +50,7 @@ orjson==3.11.5
 # CRITICAL: ChromaDB 1.3.4 requires onnxruntime>=1.14.1
 # Using Python 3.11 for compatibility (Python 3.12 doesn't have onnxruntime wheels on Linux yet)
 onnxruntime>=1.14.1  # Required by chromadb, compatible with Python 3.11
-chromadb==1.3.7
+chromadb==1.4.0
 sentence-transformers>=2.7.0  # Updated to support newer huggingface_hub
 
 # Security & Rate Limiting