Fix processHistoricalEvent implementation in Gorgias ticket message source

- Add missing processHistoricalEvent method to ticket-message-created source
- Remove empty deploy hook override that was preventing historical event processing
- Add getMessage method to Gorgias OAuth app for retrieving individual messages

Resolves 'processHistoricalEvent is not implemented' error when creating
New Internal Note Created webhook source.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: seynadio

components/gorgias_oauth/gorgias_oauth.app.mjs

@@ -401,6 +401,14 @@ export default {
         ...opts,
       });
     },
+    async getMessage({
+      $, id,
+    }) {
+      return this._makeRequest({
+        $,
+        path: `messages/${id}`,
+      });
+    },
     createMessage({
       ticketId, ...opts
     }) {

components/gorgias_oauth/sources/ticket-message-created/ticket-message-created.mjs

@@ -49,7 +49,6 @@ export default {
   },
   hooks: {
     ...base.hooks,
-    deploy() {},
   },
   methods: {
     ...base.methods,
@@ -63,6 +62,14 @@ export default {
         && (!this.sender || message.sender.email === this.sender)
         && (!this.receiver || message.receiver.email === this.receiver);
     },
+    async processHistoricalEvent(event) {
+      const message = await this.gorgias_oauth.getMessage({
+        id: event.object_id,
+      });
+      return {
+        message,
+      };
+    },
     async processEvent(event) {
       const { message } = event;
       if (this.isRelevant(message)) {