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## Summary Improve the diagnostic range for `invalid-assignment` diagnostics, and add source annotations for the value and target type. closes https://github.com/astral-sh/ty/issues/1556 ### Before <img width="836" height="601" alt="image" src="https://github.com/user-attachments/assets/a48219bb-58a8-4a83-b290-d09ef50ce5f0" /> ### After <img width="857" height="742" alt="image" src="https://github.com/user-attachments/assets/cfcaa4f4-94fb-459e-8d64-97050dfecb50" /> ## Ecosystem impact Very good! Due to the wider diagnostic range, we now pick up more `# type: ignore` directives that were supposed to suppress an invalid assignment diagnostic. ## Test Plan New snapshot tests