Remove docling dependency and related packages from project

* Remove docling from pyproject.toml
* Update requirements files
* Clean up uv.lock dependencies
* Reduce offline docker image size

pyproject.toml

@@ -82,7 +82,6 @@ api = [
 # Offline deployment dependencies (layered design for flexibility)
 offline-docs = [
     # Document processing dependencies
-    "docling>=1.0.0,<3.0.0",
     "pypdf2>=3.0.0",
     "python-docx>=0.8.11,<2.0.0",
     "python-pptx>=0.6.21,<2.0.0",

requirements-offline-docs.txt

@@ -8,7 +8,6 @@
 # Or use constraints: pip install --constraint constraints-offline.txt -r requirements-offline-docs.txt
 
 # Document processing dependencies (with version constraints matching pyproject.toml)
-docling>=1.0.0,<3.0.0
 openpyxl>=3.0.0,<4.0.0
 pypdf2>=3.0.0
 python-docx>=0.8.11,<2.0.0

requirements-offline.txt

@@ -15,7 +15,6 @@ anthropic>=0.18.0,<1.0.0
 asyncpg>=0.29.0,<1.0.0
 
 # Document processing dependencies
-docling>=1.0.0,<3.0.0
 llama-index>=0.9.0,<1.0.0
 neo4j>=5.0.0,<7.0.0
 ollama>=0.1.0,<1.0.0