Parsed ``oc_status.json`` — the project's Option C compliance state.
Fields mirror the on-disk JSON:
``stage``
One of ``bootstrap`` / ``migrating`` / ``compliant`` — see
:data:`VALID_STAGES`. Validated at construction.
``pillars``
Per-pillar enablement dict (``linter``, ``diagnostics``, ``git``,
``docs``, ``tests``, ``scaffold``). Each entry is
``{"enabled": bool, "since": str | None}``.
``migrated_from``
Legacy paths that were copied into ``.option_c/`` — kept for
``oct audit`` to cross-reference. Empty dict on fresh scaffolds.
``oct_version_at_migration``
The ``importlib.metadata.version("oct")`` seen when the file was
first written. Useful for audit trails and future schema bumps.
Definition at line 146 of file option_c_dir.py.