Add deployment tracking schema (Migration 018)

Creates deployments and deployment_logs tables for tracking all
deployment types (Docker, MCP, iOS/macOS, services). Includes
deployment status, timing, git integration, and structured logging.

Also adds run-migration.mjs helper for running migrations against
PostgreSQL database.

Part of CF-290, completes CF-291.

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

run-migration.mjs

@@ -0,0 +1,62 @@
+#!/usr/bin/env node
+/**
+ * Run a migration file against the task-mcp database
+ * Usage: node run-migration.mjs <migration-file>
+ */
+
+import pg from 'pg';
+import { readFileSync } from 'fs';
+import { fileURLToPath } from 'url';
+import { dirname, join } from 'path';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = dirname(__filename);
+
+const { Pool } = pg;
+
+// Database configuration
+const pool = new Pool({
+  host: process.env.POSTGRES_HOST || 'infra.agiliton.internal',
+  port: 5432,
+  database: 'agiliton',
+  user: 'agiliton',
+  password: 'QtqiwCOAUpQNF6pjzOMAREzUny2bY8V1',
+  max: 1,
+  connectionTimeoutMillis: 5000,
+});
+
+async function runMigration(migrationFile) {
+  const client = await pool.connect();
+
+  try {
+    console.log(`Running migration: ${migrationFile}`);
+
+    // Read migration file
+    const migrationPath = join(__dirname, 'migrations', migrationFile);
+    const sql = readFileSync(migrationPath, 'utf-8');
+
+    // Execute migration
+    await client.query(sql);
+
+    console.log(`Migration completed successfully: ${migrationFile}`);
+  } catch (error) {
+    console.error(`Migration failed: ${error.message}`);
+    throw error;
+  } finally {
+    client.release();
+    await pool.end();
+  }
+}
+
+// Get migration file from command line
+const migrationFile = process.argv[2];
+
+if (!migrationFile) {
+  console.error('Usage: node run-migration.mjs <migration-file>');
+  console.error('Example: node run-migration.mjs 018_deployments.sql');
+  process.exit(1);
+}
+
+runMigration(migrationFile)
+  .then(() => process.exit(0))
+  .catch(() => process.exit(1));