T19-01 Phase 2: Static compatibility analyzer

[edithatogo]

Track phase issue governed by the T19-01 Conductor plan.

Parent track: #550
Parent phase: #554
Plan: conductor/tracks/T19-01/plan.md

Implementation is not authorized by planning-only track creation.

• Define versioned editor capability profiles and schema fingerprints.
• Implement pure node/mark inventory and compatibility analysis.
• Treat primary-editor incompatibility as a hard stop and auxiliary incompatibility as an explicit editability-risk state.
• Add property-based, mutation and malformed-payload tests.
• Phase Verification & Checkpoint (see conductor/workflow.md).

[edithatogo]

Season 1 evidence update: tableHeader must be a hard-error node in the current primary-editor profile. Analyzer output should include JSON path, per-node counts, affected table counts, target surface/profile, and a no-write result. See the audit comment on #550.

[edithatogo]

Completed via PR #601. Profile definitions and static AST compatibility analyzer implemented with schema fingerprints and exact path diagnostics.