DX: Expand Type Hinting Strictness Across Codebase #142
Description
Expand mypy strict mode to tests/, add comprehensive type hints, enforce CI type checking. Prevents runtime type errors, improves IDE support. Effort: 4-5 days.
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Expand mypy strict mode to tests/, add comprehensive type hints, enforce CI type checking. Prevents runtime type errors, improves IDE support. Effort: 4-5 days.