Additional commitment statuses

**Context**
Currently, we have a progress score, that tracks progress from 0 to 5, where 0 is "not started", 5 is "done" and everything in between is various state of "in progress".

There are two additional states we may want to be ready to capture:
1. Broken: if the government explicitly decides to stop working on a commitment. Or, if a new government comes into power before a commitment could be completed.
2. Partially Completed: if the government completes a commitment, but has materially changed its promise, or gets it done significantly later than initially committed.

Perhaps another field? Need to align on approach.

No files, tests, or entry points are named. Start by locating the existing progress-score model and status handling in the TypeScript project, then clarify the agreed representation and behavior for Broken and Partially Completed; done means the approach is decided and consistently captured.

Written by the indexing model from the issue text.