feat: Migrate data storage to PostgreSQL with schema setup, initialization script, and update documentation

src/index.ts

@@ -5,6 +5,7 @@
 
 import { mcpServer } from "./server.js";
 import { logger } from "./utils/logger.js";
+import { database } from "./storage/database.js";
 
 // Register all tools
 import { registerCodeSnippetTools } from "./tools/programming/codeSnippet.js";
@@ -57,10 +58,30 @@ registerNoteTools();
 registerTaskTools();
 registerEmailTools();
 
-logger.info("All tools registered. Starting MCP server...");
+logger.info("All tools registered. Initializing database...");
 
-// Start the server
-mcpServer.start().catch((error) => {
-  logger.error("Failed to start MCP server:", error);
-  process.exit(1);
+// Initialize database connection
+database
+  .initialize()
+  .then(() => {
+    logger.info("Database connected successfully. Starting MCP server...");
+    // Start the server
+    return mcpServer.start();
+  })
+  .catch((error) => {
+    logger.error("Failed to initialize database or start MCP server:", error);
+    process.exit(1);
+  });
+
+// Graceful shutdown
+process.on("SIGINT", async () => {
+  logger.info("Shutting down...");
+  await database.close();
+  process.exit(0);
+});
+
+process.on("SIGTERM", async () => {
+  logger.info("Shutting down...");
+  await database.close();
+  process.exit(0);
 });