feat: v1.3.1 - Multi-transport + Production deployment

- Add HTTP transport (StreamableHTTPServerTransport)
- Add shared server module (src/server/)
- Configure production for hub.descomplicar.pt
- Add SSH tunnel script (start-tunnel.sh)
- Fix connection leak in pg-client.ts
- Fix atomicity bug in comments deletion
- Update docs with test plan for 164 tools

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

src/pg-client.ts

@@ -14,22 +14,22 @@ export class PgClient {
   constructor(config: DatabaseConfig) {
     const poolConfig: PoolConfig = config.connectionString
       ? {
-          connectionString: config.connectionString,
-          max: config.max,
-          idleTimeoutMillis: config.idleTimeoutMillis,
-          connectionTimeoutMillis: config.connectionTimeoutMillis
-        }
+        connectionString: config.connectionString,
+        max: config.max,
+        idleTimeoutMillis: config.idleTimeoutMillis,
+        connectionTimeoutMillis: config.connectionTimeoutMillis
+      }
       : {
-          host: config.host,
-          port: config.port,
-          user: config.user,
-          password: config.password,
-          database: config.database,
-          ssl: config.ssl ? { rejectUnauthorized: false } : false,
-          max: config.max,
-          idleTimeoutMillis: config.idleTimeoutMillis,
-          connectionTimeoutMillis: config.connectionTimeoutMillis
-        };
+        host: config.host,
+        port: config.port,
+        user: config.user,
+        password: config.password,
+        database: config.database,
+        ssl: config.ssl ? { rejectUnauthorized: false } : false,
+        max: config.max,
+        idleTimeoutMillis: config.idleTimeoutMillis,
+        connectionTimeoutMillis: config.connectionTimeoutMillis
+      };
 
     this.pool = new Pool(poolConfig);
 
@@ -50,10 +50,10 @@ export class PgClient {
    * Test database connection
    */
   async testConnection(): Promise<boolean> {
+    let client = null;
     try {
-      const client = await this.pool.connect();
+      client = await this.pool.connect();
       await client.query('SELECT 1');
-      client.release();
       this.isConnected = true;
       logger.info('PostgreSQL connection successful');
       return true;
@@ -63,6 +63,10 @@ export class PgClient {
       });
       this.isConnected = false;
       return false;
+    } finally {
+      if (client) {
+        client.release();
+      }
     }
   }
 
@@ -119,7 +123,13 @@ export class PgClient {
       await client.query('COMMIT');
       return result;
     } catch (error) {
-      await client.query('ROLLBACK');
+      try {
+        await client.query('ROLLBACK');
+      } catch (rollbackError) {
+        logger.error('Rollback failed', {
+          error: rollbackError instanceof Error ? rollbackError.message : String(rollbackError),
+        });
+      }
       throw error;
     } finally {
       client.release();