fix: resolve migration 004 transaction and executeSet errors

- Remove explicit transaction wrapping in migration service that caused
  "cannot start a transaction within a transaction" errors
- Fix executeSet method call format to include both statement and values
  properties as required by Capacitor SQLite plugin
- Update CapacitorPlatformService to properly handle multi-statement SQL
  using executeSet for migration SQL blocks
- Ensure migration 004 (active_identity_management) executes atomically
  without nested transaction conflicts
- Remove unnecessary try/catch wrapper

Fixes iOS simulator migration failures where:
- Migration 004 would fail with transaction errors
- executeSet would fail with "Must provide a set as Array of {statement,values}"
- Database initialization would fail after migration errors

Tested on iOS simulator with successful migration completion and
active_identity table creation with proper data migration.

src/services/migrationService.ts

@@ -687,58 +687,48 @@ export async function runMigrations<T>(
       }
 
       try {
-        // Execute the migration SQL as single atomic operation with transaction
+        // Execute the migration SQL as single atomic operation
         if (isDevelopment) {
           migrationLog(`🔧 [Migration] Executing SQL for: ${migration.name}`);
           migrationLog(`🔧 [Migration] SQL content: ${migration.sql}`);
         }
 
-        // Begin transaction for atomic execution
-        await sqlExec("BEGIN IMMEDIATE");
+        // Execute the migration SQL directly - it should be atomic
+        // The SQL itself should handle any necessary transactions
+        const execResult = await sqlExec(migration.sql);
 
-        try {
-          const execResult = await sqlExec(migration.sql);
-
-          if (isDevelopment) {
-            migrationLog(
-              `🔧 [Migration] SQL execution result: ${JSON.stringify(execResult)}`,
-            );
-          }
+        if (isDevelopment) {
+          migrationLog(
+            `🔧 [Migration] SQL execution result: ${JSON.stringify(execResult)}`,
+          );
+        }
 
-          // Validate the migration was applied correctly (only in development)
-          if (isDevelopment) {
-            const validation = await validateMigrationApplication(
-              migration,
-              sqlQuery,
+        // Validate the migration was applied correctly (only in development)
+        if (isDevelopment) {
+          const validation = await validateMigrationApplication(
+            migration,
+            sqlQuery,
+          );
+          if (!validation.isValid) {
+            logger.warn(
+              `⚠️  [Migration] Validation failed for ${migration.name}:`,
+              validation.errors,
             );
-            if (!validation.isValid) {
-              logger.warn(
-                `⚠️  [Migration] Validation failed for ${migration.name}:`,
-                validation.errors,
-              );
-            }
           }
+        }
 
-          // Record that the migration was applied
-          await sqlExec("INSERT INTO migrations (name) VALUES (?)", [
-            migration.name,
-          ]);
-
-          // Commit transaction
-          await sqlExec("COMMIT");
+        // Record that the migration was applied
+        await sqlExec("INSERT INTO migrations (name) VALUES (?)", [
+          migration.name,
+        ]);
 
-          // Only log success in development
-          if (isDevelopment) {
-            migrationLog(
-              `🎉 [Migration] Successfully applied: ${migration.name}`,
-            );
-          }
-          appliedCount++;
-        } catch (error) {
-          // Rollback transaction on any error
-          await sqlExec("ROLLBACK");
-          throw error;
+        // Only log success in development
+        if (isDevelopment) {
+          migrationLog(
+            `🎉 [Migration] Successfully applied: ${migration.name}`,
+          );
         }
+        appliedCount++;
       } catch (error) {
         logger.error(`❌ [Migration] Error applying ${migration.name}:`, error);
 

src/services/platforms/CapacitorPlatformService.ts

@@ -508,9 +508,24 @@ export class CapacitorPlatformService implements PlatformService {
         // This is essential for proper parameter binding and SQL injection prevention
         await this.db!.run(sql, params);
       } else {
-        // Use execute method for non-parameterized queries
-        // This is more efficient for simple DDL statements
-        await this.db!.execute(sql);
+        // For multi-statement SQL (like migrations), use executeSet method
+        // This handles multiple statements properly
+        if (
+          sql.includes(";") &&
+          sql.split(";").filter((s) => s.trim()).length > 1
+        ) {
+          // Multi-statement SQL - use executeSet for proper handling
+          const statements = sql.split(";").filter((s) => s.trim());
+          await this.db!.executeSet(
+            statements.map((stmt) => ({
+              statement: stmt.trim(),
+              values: [], // Empty values array for non-parameterized statements
+            })),
+          );
+        } else {
+          // Single statement - use execute method
+          await this.db!.execute(sql);
+        }
       }
     };