feat: introduce trigger functionality (#27644)

Signed-off-by: lyzno1 <yuanyouhuilyz@gmail.com>
Co-authored-by: Stream <Stream_2@qq.com>
Co-authored-by: lyzno1 <92089059+lyzno1@users.noreply.github.com>
Co-authored-by: zhsama <torvalds@linux.do>
Co-authored-by: Harry <xh001x@hotmail.com>
Co-authored-by: lyzno1 <yuanyouhuilyz@gmail.com>
Co-authored-by: yessenia <yessenia.contact@gmail.com>
Co-authored-by: hjlarry <hjlarry@163.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: WTW0313 <twwu@dify.ai>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

api/events/event_handlers/sync_webhook_when_app_created.py

@@ -0,0 +1,22 @@
+import logging
+
+from events.app_event import app_draft_workflow_was_synced
+from models.model import App, AppMode
+from models.workflow import Workflow
+from services.trigger.webhook_service import WebhookService
+
+logger = logging.getLogger(__name__)
+
+
+@app_draft_workflow_was_synced.connect
+def handle(sender, synced_draft_workflow: Workflow, **kwargs):
+    """
+    While creating a workflow or updating a workflow, we may need to sync
+    its webhook relationships in DB.
+    """
+    app: App = sender
+    if app.mode != AppMode.WORKFLOW.value:
+        # only handle workflow app, chatflow is not supported yet
+        return
+
+    WebhookService.sync_webhook_relationships(app, synced_draft_workflow)