feat(webhooks): add EspoCRM Document Delete and Update webhook handlers with detailed logging

- Implemented document delete webhook handler to process delete notifications from EspoCRM.
- Added detailed logging for incoming payloads, including headers and entity information.
- Extracted and emitted document IDs for further processing.
- Implemented document update webhook handler to handle update notifications from EspoCRM.
- Enhanced logging for update payloads, including changed fields and metadata.
- Both handlers emit events for queue processing to facilitate further actions.

test: add comprehensive xAI Collections API test suite

- Created a test suite for xAI Collections API covering critical operations.
- Included tests for file uploads, CRUD operations on collections and documents, and response structures.
- Verified shared file behavior across multiple collections.
- Implemented cleanup procedures to remove test resources after execution.

steps/espocrm_webhooks/__init__.py

@@ -0,0 +1,6 @@
+"""
+EspoCRM Generic Webhooks
+
+Empfängt Webhooks von EspoCRM für verschiedene Entities.
+Zentrale Anlaufstelle für alle EspoCRM-Events außerhalb VMH-Kontext.
+"""