chore: add lm-format-enforcer and update pre-commit mypy hook

Add lm-format-enforcer to type_checking dependencies and update the
pre-commit mypy hook to use local repo with uv run --group dev --group
type_checking for better integration with dependency groups.

This reduces mypy errors from 73 to 58 (one additional error fixed).

Author: ashwinb

.pre-commit-config.yaml

@@ -57,18 +57,17 @@ repos:
     hooks:
     -   id: uv-lock
 
--   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.16.1
+-   repo: local
     hooks:
     -   id: mypy
+        name: mypy
         additional_dependencies:
-          - uv==0.6.2
-          - mypy
-          - pytest
-          - rich
-          - types-requests
-          - pydantic
+          - uv==0.7.8
+        entry: uv run --group dev --group type_checking mypy
+        language: python
+        types: [python]
         pass_filenames: false
+        require_serial: true
 
 # - repo: https://github.com/tcort/markdown-link-check
 #   rev: v3.11.2

pyproject.toml

@@ -103,9 +103,9 @@ type_checking = [
     "torchvision",  # For multimodal model type checking
     "sqlite-vec",  # For SQLite vector store type checking
     "faiss-cpu",  # For Faiss vector store type checking
+    "lm-format-enforcer",  # For constrained generation type checking
     "mcp",  # For Model Context Protocol tools type checking
     "ollama",  # For Ollama provider type checking
-    # Note: lmformatenforcer is not available in PyPI, so it remains an import-not-found error
 ]
 # These are the dependencies required for running unit tests.
 unit = [