fix(py): missing config (#452)

Author: yesudeep

docs/contributing/coding_guidelines.md

@@ -57,9 +57,11 @@ Both type checkers are configured in `python/pyproject.toml`.
   and infer return types
 * `python_version = "3.10"`: Matches ruff.target-version
 
-**ty** (`[tool.ty.src]`):
+**ty** (`[[tool.ty.overrides]]`):
 
-* `exclude`: Excludes the `samples` directory (external dependencies not in workspace)
+* Uses overrides to ignore `unresolved-import` errors in `samples/` directory
+  (external dependencies not installed in the workspace)
+* ty still type-checks all code in samples, just tolerates missing third-party imports
 
 ### Error Suppression Policy
 

python/pyproject.toml

@@ -190,6 +190,11 @@ untyped_def_behavior = "check-and-infer-return-type"
 # example-error-code = false
 
 # ty (Astral/Ruff) type checker configuration.
-[tool.ty.src]
-# Exclude samples directory as they have external dependencies not in the workspace.
-exclude = ["samples"]
+# Use overrides to ignore unresolved-import errors in samples directory,
+# which has external dependencies not installed in the workspace.
+# This lets ty check all code while tolerating missing third-party stubs.
+[[tool.ty.overrides]]
+include = ["samples/**"]
+
+[tool.ty.overrides.rules]
+unresolved-import = "ignore"