debug: add diagnostic endpoints to test NODE_ENV and database pooling

Added two diagnostic endpoints:
- /api/debug/env: Shows NODE_ENV and globalThis.database status
- /api/debug/db-test: Measures database query performance

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

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

Author: waleed

apps/sim/app/api/debug/db-test/route.ts

@@ -0,0 +1,52 @@
+import { db } from '@sim/db'
+import { sql } from 'drizzle-orm'
+import { NextResponse } from 'next/server'
+
+export const dynamic = 'force-dynamic'
+
+export async function GET() {
+  const measurements: Record<string, number> = {}
+
+  try {
+    // Test 1: Simple query
+    const t1 = performance.now()
+    await db.execute(sql`SELECT 1`)
+    measurements.simpleQuery = performance.now() - t1
+
+    // Test 2: Check if globalThis caching is working
+    const t2 = performance.now()
+    const dbRef1 = globalThis.database
+    measurements.checkGlobalThis = performance.now() - t2
+
+    // Test 3: Another simple query
+    const t3 = performance.now()
+    await db.execute(sql`SELECT 1`)
+    measurements.simpleQuery2 = performance.now() - t3
+
+    // Test 4: Check connection
+    const t4 = performance.now()
+    await db.execute(sql`SELECT current_database(), current_user, version()`)
+    measurements.connectionInfo = performance.now() - t4
+
+    return NextResponse.json({
+      success: true,
+      NODE_ENV: process.env.NODE_ENV,
+      hasCachedDatabase: !!globalThis.database,
+      isSameDbInstance: dbRef1 === globalThis.database,
+      measurements,
+      timestamp: new Date().toISOString(),
+    })
+  } catch (error: any) {
+    return NextResponse.json(
+      {
+        success: false,
+        error: error.message,
+        NODE_ENV: process.env.NODE_ENV,
+        hasCachedDatabase: !!globalThis.database,
+        measurements,
+        timestamp: new Date().toISOString(),
+      },
+      { status: 500 }
+    )
+  }
+}

apps/sim/app/api/debug/env/route.ts

@@ -0,0 +1,17 @@
+import { NextResponse } from 'next/server'
+
+export const dynamic = 'force-dynamic'
+
+export async function GET() {
+  return NextResponse.json({
+    NODE_ENV: process.env.NODE_ENV,
+    nodeVersion: process.version,
+    platform: process.platform,
+    arch: process.arch,
+    uptime: process.uptime(),
+    memoryUsage: process.memoryUsage(),
+    // Check if globalThis.database exists
+    hasCachedDatabase: !!globalThis.database,
+    timestamp: new Date().toISOString(),
+  })
+}