Add documentation files for P2.1 Batch A refactoring:
- BATCH_A_COMPLETION_SUMMARY.md: Summary of 7 completed refactorings
- SESSION_RECONSTITUTION.md: Session reconstitution notes and verification
These documents track the completion of Batch A work and provide context
for future reference and session continuation.
Refs: docs/progress/P2.1-BATCH-A-STATE.md
