Initial commit: email-openclaw bridge v1

Full pipeline: IMAP ingress -> OpenClaw dispatch -> callback -> SMTP reply.
SQLite stateful storage with idempotency, threading, and retry logic.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,15 @@
+services:
+  bridge:
+    build: .
+    container_name: claw-email-bridge
+    restart: unless-stopped
+    env_file:
+      - .env
+    ports:
+      - "8080:8080"
+    volumes:
+      - bridge-data:/app/data
+
+volumes:
+  bridge-data:
+    driver: local