fix: resolve database integration test issues

- Fix better-sqlite3 import statements to use namespace import
- Update test schemas to match actual database schema
- Align NodeRepository tests with actual API implementation
- Fix FTS5 tests to work with templates instead of nodes
- Update mock data to match ParsedNode interface
- Fix column names to match actual schema (node_type, package_name, etc)
- Add proper ParsedNode creation helper function
- Remove tests for non-existent foreign key constraints

tests/integration/database/transactions.test.ts

@@ -112,8 +112,12 @@ describe('Database Transactions', () => {
 
       // Insert first node
       const insertStmt = db.prepare(`
-        INSERT INTO nodes (name, type, display_name, package, version, type_version, data)
-        VALUES (?, ?, ?, ?, ?, ?, ?)
+        INSERT INTO nodes (
+          node_type, package_name, display_name, description,
+          category, development_style, is_ai_tool, is_trigger,
+          is_webhook, is_versioned, version, documentation,
+          properties_schema, operations, credentials_required
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
       `);
 
       insertStmt.run(
@@ -462,8 +466,12 @@ describe('Database Transactions', () => {
       // Insert initial data
       const nodes = TestDataGenerator.generateNodes(2);
       const insertStmt = db.prepare(`
-        INSERT INTO nodes (name, type, display_name, package, version, type_version, data)
-        VALUES (?, ?, ?, ?, ?, ?, ?)
+        INSERT INTO nodes (
+          node_type, package_name, display_name, description,
+          category, development_style, is_ai_tool, is_trigger,
+          is_webhook, is_versioned, version, documentation,
+          properties_schema, operations, credentials_required
+        ) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
       `);
 
       nodes.forEach(node => {