feat: Add 5Why_ prefix to all database tables

- Rename all tables with 5Why_ prefix for namespace isolation
- Update models: User.js, Analysis.js, AuditLog.js
- Update routes: llmConfig.js
- Update scripts: seed-test-users.js, add-deepseek-config.js, add-ollama-config.js
- Add migrate-table-prefix.js script for database migration
- Update db_schema.sql with new table names
- Update views: 5Why_user_analysis_stats, 5Why_recent_analyses

Tables renamed:
- users -> 5Why_users
- analyses -> 5Why_analyses
- analysis_perspectives -> 5Why_analysis_perspectives
- analysis_whys -> 5Why_analysis_whys
- llm_configs -> 5Why_llm_configs
- system_settings -> 5Why_system_settings
- audit_logs -> 5Why_audit_logs
- sessions -> 5Why_sessions

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

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

scripts/add-ollama-config.js

@@ -0,0 +1,81 @@
+#!/usr/bin/env node
+/**
+ * Add Ollama LLM Configuration
+ * This script adds Ollama configuration to the llm_configs table
+ */
+
+import { pool, query } from '../config.js';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+async function addOllamaConfig() {
+  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
+  console.log('  Adding Ollama LLM Configuration');
+  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
+
+  try {
+    // Check if Ollama config already exists
+    const existing = await query(
+      `SELECT id FROM 5Why_llm_configs WHERE provider = 'Ollama' LIMIT 1`
+    );
+
+    if (existing.length > 0) {
+      console.log('✅ Ollama configuration already exists (ID:', existing[0].id, ')');
+      console.log('   Skipping...\n');
+      return;
+    }
+
+    // First, deactivate all existing configs
+    await query('UPDATE 5Why_llm_configs SET is_active = 0');
+
+    // Insert Ollama configuration
+    const result = await query(
+      `INSERT INTO 5Why_llm_configs
+       (provider, api_url, api_key, model_name, temperature, max_tokens, timeout, is_active)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      [
+        'Ollama',
+        process.env.OLLAMA_API_URL || 'https://ollama_pjapi.theaken.com',
+        null, // Ollama doesn't need API key
+        process.env.OLLAMA_MODEL || 'qwen2.5:3b',
+        0.7,
+        6000,
+        120000,
+        1 // Set as active
+      ]
+    );
+
+    console.log('✅ Ollama configuration added successfully!');
+    console.log('   Config ID:', result.insertId);
+    console.log('   Provider: Ollama');
+    console.log('   Model: qwen2.5:3b');
+    console.log('   API URL:', process.env.OLLAMA_API_URL || 'https://ollama_pjapi.theaken.com');
+    console.log('   Status: Active\n');
+
+    console.log('📝 Notes:');
+    console.log('   - Ollama is FREE and runs on your infrastructure');
+    console.log('   - No API key required');
+    console.log('   - Current model: qwen2.5:3b');
+    console.log('   - You can manage it in Admin Panel > LLM 配置\n');
+
+  } catch (error) {
+    console.error('❌ Error adding Ollama configuration:', error.message);
+    process.exit(1);
+  } finally {
+    await pool.end();
+  }
+}
+
+// Run the script
+addOllamaConfig()
+  .then(() => {
+    console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
+    console.log('  Configuration Complete');
+    console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
+    process.exit(0);
+  })
+  .catch((error) => {
+    console.error('Fatal error:', error);
+    process.exit(1);
+  });