feat(schema-manager): Add Schema Management module and expose it in public API; update README to mark Phase 3 complete and move priorities to Phase 4

readme.hints.md

@@ -42,7 +42,7 @@
   - Cache hit/miss statistics
   - Example at `ts/examples/kv/kv-store-example.ts`
 
-**Phase 3: Advanced Features**
+**Phase 3: Advanced Features (100%)** - Complete!
 - **Plugin Architecture (100%)** - Extensible request/response middleware:
   - Plugin lifecycle hooks (beforeRequest, afterResponse, onError)
   - Plugin priority and execution ordering
@@ -58,6 +58,30 @@
   - Shared context between plugins
   - Timeout protection for plugin hooks
   - Example at `ts/examples/plugins/plugin-example.ts`
+- **Transaction Support (100%)** - ACID-like distributed transactions:
+  - Optimistic concurrency control (seq_no/primary_term)
+  - Automatic rollback with compensation operations
+  - Savepoints for partial rollback
+  - Conflict detection and configurable resolution (retry, abort, skip, force)
+  - Multi-document atomic operations
+  - Isolation levels (read_uncommitted, read_committed, repeatable_read)
+  - Transaction callbacks (onBegin, onCommit, onRollback, onConflict)
+  - Transaction statistics and monitoring
+  - Timeout with automatic cleanup
+  - Example at `ts/examples/transactions/transaction-example.ts`
+- **Schema Management (100%)** - Index mapping management and migrations:
+  - Index creation with mappings, settings, and aliases
+  - Schema validation before apply
+  - Versioned migrations with history tracking
+  - Schema diff and comparison (added/removed/modified fields)
+  - Breaking change detection
+  - Index templates (composable and legacy)
+  - Component templates
+  - Alias management with filters
+  - Dynamic settings updates
+  - Migration rollback support
+  - Dry run mode for testing
+  - Example at `ts/examples/schema/schema-example.ts`
 
 ### Query Builder Usage
 
@@ -81,11 +105,10 @@ const stats = await createQuery<Product>('products')
   .execute();
 ```
 
-### Next Priorities
-1. **Transaction Support** (Phase 3) - Distributed transactions across multiple documents
-2. **Schema Management** (Phase 3) - Index mapping management and migrations
-3. **Comprehensive Test Suite** (Phase 4) - Full test coverage
-4. **Migration Guide** (Phase 4) - Guide from v2 to v3
+### Next Priorities (Phase 4)
+1. **Comprehensive Test Suite** - Full test coverage for all modules
+2. **Migration Guide** - Guide from v2 to v3 API
+3. **README Update** - Update main README with new v3 API documentation
 
 ### Structure
 - Single `ts/` directory (no parallel structures)