Add ECDSA signature verification and enhance ComboHandler functionality

- Integrated ECDSA for signature verification in ComboHandler.
- Updated event emissions to include additional parameters for better tracking.
- Improved gas tracking during execution of combo plans.
- Enhanced database interactions for storing and retrieving plans, including conflict resolution and status updates.
- Added new dependencies for security and database management in orchestrator.

orchestrator/src/db/migrations/001_initial_schema.ts

@@ -0,0 +1,47 @@
+import { query } from "../postgres";
+import fs from "fs";
+import path from "path";
+
+/**
+ * Run initial database schema migration
+ */
+export async function up() {
+  const schemaPath = path.join(__dirname, "../schema.sql");
+  const schema = fs.readFileSync(schemaPath, "utf-8");
+
+  // Split by semicolons and execute each statement
+  const statements = schema
+    .split(";")
+    .map((s) => s.trim())
+    .filter((s) => s.length > 0 && !s.startsWith("--"));
+
+  for (const statement of statements) {
+    try {
+      await query(statement);
+    } catch (error: any) {
+      // Ignore "already exists" errors
+      if (!error.message.includes("already exists")) {
+        throw error;
+      }
+    }
+  }
+
+  console.log("✅ Database schema migrated successfully");
+}
+
+/**
+ * Rollback migration (not implemented for initial schema)
+ */
+export async function down() {
+  // Drop tables in reverse order
+  await query("DROP TABLE IF EXISTS compliance_status CASCADE");
+  await query("DROP TABLE IF EXISTS users CASCADE");
+  await query("DROP TABLE IF EXISTS audit_logs CASCADE");
+  await query("DROP TABLE IF EXISTS receipts CASCADE");
+  await query("DROP TABLE IF EXISTS executions CASCADE");
+  await query("DROP TABLE IF EXISTS plans CASCADE");
+  await query("DROP FUNCTION IF EXISTS update_updated_at_column CASCADE");
+
+  console.log("✅ Database schema rolled back");
+}
+

orchestrator/src/db/migrations/index.ts

@@ -0,0 +1,15 @@
+import { up as up001 } from "./001_initial_schema";
+
+/**
+ * Run all migrations
+ */
+export async function runMigration() {
+  try {
+    await up001();
+    console.log("✅ All migrations completed");
+  } catch (error) {
+    console.error("❌ Migration failed:", error);
+    throw error;
+  }
+}
+