fix: webhook and 4 other nodes incorrectly marked as non-triggers

Fixed issue where Docker images using sql.js adapter returned boolean fields
as strings, causing is_trigger=0 to evaluate as true instead of false.

Changes:
- Added convertIntegerColumns() to sql.js adapter to convert SQLite integers
- Updated server.ts and node-repository.ts to use Number() conversion as backup
- Added test script to verify fix works with sql.js adapter

This fixes webhook, cron, interval, and emailReadImap nodes showing
isTrigger: false in Docker deployments.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/database/database-adapter.ts

@@ -338,7 +338,7 @@ class SQLJSStatement implements PreparedStatement {
     if (this.stmt.step()) {
       const result = this.stmt.getAsObject();
       this.stmt.reset();
-      return result;
+      return this.convertIntegerColumns(result);
     }
     
     this.stmt.reset();
@@ -354,7 +354,7 @@ class SQLJSStatement implements PreparedStatement {
     
     const results: any[] = [];
     while (this.stmt.step()) {
-      results.push(this.stmt.getAsObject());
+      results.push(this.convertIntegerColumns(this.stmt.getAsObject()));
     }
     
     this.stmt.reset();
@@ -400,4 +400,24 @@ class SQLJSStatement implements PreparedStatement {
       this.boundParams = params;
     }
   }
+  
+  /**
+   * Convert SQLite integer columns to JavaScript numbers
+   * sql.js returns all values as strings, but we need proper types for boolean conversion
+   */
+  private convertIntegerColumns(row: any): any {
+    if (!row) return row;
+    
+    // Known integer columns in the nodes table
+    const integerColumns = ['is_ai_tool', 'is_trigger', 'is_webhook', 'is_versioned'];
+    
+    const converted = { ...row };
+    for (const col of integerColumns) {
+      if (col in converted && typeof converted[col] === 'string') {
+        converted[col] = parseInt(converted[col], 10);
+      }
+    }
+    
+    return converted;
+  }
 }

src/database/node-repository.ts

@@ -53,10 +53,10 @@ export class NodeRepository {
       category: row.category,
       developmentStyle: row.development_style,
       package: row.package_name,
-      isAITool: !!row.is_ai_tool,
-      isTrigger: !!row.is_trigger,
-      isWebhook: !!row.is_webhook,
-      isVersioned: !!row.is_versioned,
+      isAITool: Number(row.is_ai_tool) === 1,
+      isTrigger: Number(row.is_trigger) === 1,
+      isWebhook: Number(row.is_webhook) === 1,
+      isVersioned: Number(row.is_versioned) === 1,
       version: row.version,
       properties: this.safeJsonParse(row.properties_schema, []),
       operations: this.safeJsonParse(row.operations, []),