feat: Complete cloud-native CIM Document Processor with full BPCP template

🌐 Cloud-Native Architecture:
- Firebase Functions deployment (no Docker)
- Supabase database (replacing local PostgreSQL)
- Google Cloud Storage integration
- Document AI + Agentic RAG processing pipeline
- Claude-3.5-Sonnet LLM integration

✅ Full BPCP CIM Review Template (7 sections):
- Deal Overview
- Business Description
- Market & Industry Analysis
- Financial Summary (with historical financials table)
- Management Team Overview
- Preliminary Investment Thesis
- Key Questions & Next Steps

🔧 Cloud Migration Improvements:
- PostgreSQL → Supabase migration complete
- Local storage → Google Cloud Storage
- Docker deployment → Firebase Functions
- Schema mapping fixes (camelCase/snake_case)
- Enhanced error handling and logging
- Vector database with fallback mechanisms

📄 Complete End-to-End Cloud Workflow:
1. Upload PDF → Document AI extraction
2. Agentic RAG processing → Structured CIM data
3. Store in Supabase → Vector embeddings
4. Auto-generate PDF → Full BPCP template
5. Download complete CIM review

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

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

backend/test-chunk-insert.js

@@ -0,0 +1,71 @@
+const { createClient } = require('@supabase/supabase-js');
+require('dotenv').config();
+
+const supabase = createClient(process.env.SUPABASE_URL, process.env.SUPABASE_SERVICE_KEY);
+
+async function testChunkInsert() {
+  console.log('🧪 Testing exact chunk insert that is failing...');
+  
+  const testChunk = {
+    document_id: 'test-doc-123',
+    content: 'This is test content for chunk processing',
+    chunk_index: 1,
+    metadata: { test: true },
+    embedding: new Array(1536).fill(0.1)
+  };
+  
+  console.log('📤 Inserting test chunk with select...');
+  const { data, error } = await supabase
+    .from('document_chunks')
+    .insert(testChunk)
+    .select()
+    .single();
+  
+  if (error) {
+    console.log('❌ Insert with select failed:', error.message);
+    console.log('Error details:', error);
+    
+    // Try without select
+    console.log('🔄 Trying insert without select...');
+    const { error: insertError } = await supabase
+      .from('document_chunks')
+      .insert(testChunk);
+      
+    if (insertError) {
+      console.log('❌ Plain insert also failed:', insertError.message);
+    } else {
+      console.log('✅ Plain insert worked');
+      
+      // Now try to select it back
+      console.log('🔍 Trying to select the inserted record...');
+      const { data: selectData, error: selectError } = await supabase
+        .from('document_chunks')
+        .select('*')
+        .eq('document_id', 'test-doc-123')
+        .single();
+        
+      if (selectError) {
+        console.log('❌ Select failed:', selectError.message);
+      } else {
+        console.log('✅ Select worked');
+        console.log('📋 Returned columns:', Object.keys(selectData));
+        console.log('Has chunk_index:', 'chunk_index' in selectData);
+        console.log('chunk_index value:', selectData.chunk_index);
+      }
+    }
+  } else {
+    console.log('✅ Insert with select worked!');
+    console.log('📋 Returned columns:', Object.keys(data));
+    console.log('Has chunk_index:', 'chunk_index' in data);
+    console.log('chunk_index value:', data.chunk_index);
+  }
+  
+  // Clean up
+  console.log('🧹 Cleaning up test data...');
+  await supabase
+    .from('document_chunks')
+    .delete()
+    .eq('document_id', 'test-doc-123');
+}
+
+testChunkInsert();