fix(db): resolve SQLite channel and initialization issues

- Add sqlite-status to valid IPC channels
- Fix SQLite ready signal handling
- Improve database status tracking
- Add proper error handling for status updates
- Keep database connection open during initialization

Technical Details:
- Added sqlite-status to VALID_CHANNELS.invoke list
- Implemented sqlite-status handler with proper verification
- Added database open state verification
- Improved error handling and logging
- Fixed premature database closing

Testing Notes:
- Verify SQLite ready signal is received correctly
- Confirm database stays open after initialization
- Check status updates are processed properly
- Verify error handling for invalid states

Security:
- Validates all IPC channels
- Verifies database state before operations
- Maintains proper connection lifecycle
- Implements proper error boundaries

Author: Matthew Raymer

electron/src/rt/sqlite-init.ts

@@ -868,5 +868,35 @@ export function setupSQLiteHandlers(): void {
     }
   });
 
+  // Handler for SQLite status updates
+  registerHandler('sqlite-status', async (_event, status: { status: string; database: string; timestamp: number }) => {
+    logger.debug('SQLite status update:', status);
+    try {
+      startDatabaseOperation();
+      if (!pluginState.instance) {
+        throw new SQLiteError('Plugin not initialized', 'sqlite-status');
+      }
+      
+      // Verify database is still open
+      const isOpen = await pluginState.instance.isDBOpen({ database: status.database });
+      if (!isOpen) {
+        throw new SQLiteError('Database not open', 'sqlite-status');
+      }
+      
+      logger.info('SQLite status update processed:', { 
+        status: status.status,
+        database: status.database,
+        timestamp: new Date(status.timestamp).toISOString()
+      });
+      
+      return { success: true, isOpen };
+    } catch (error) {
+      logger.error('SQLite status update failed:', error);
+      throw error;
+    } finally {
+      endDatabaseOperation();
+    }
+  });
+
   logger.info('SQLite IPC handlers setup complete');
 }