Enhance EspoCRM API and Webhook Handling

- Improved logging for file uploads in EspoCRMAPI to include upload parameters and error details.
- Updated cron job configurations for calendar sync and participant sync to trigger every 15 minutes on the first minute of the hour.
- Enhanced document create, delete, and update webhook handlers to determine and log the entity type.
- Refactored document sync event handler to include entity type in sync operations and logging.
- Added a new test script for uploading preview images to EspoCRM and verifying the upload process.
- Created a test script for document thumbnail generation, including document creation, file upload, webhook triggering, and preview verification.

steps/advoware_cal_sync/calendar_sync_cron_step.py

@@ -17,7 +17,7 @@ config = {
     'description': 'Runs calendar sync automatically every 15 minutes',
     'flows': ['advoware-calendar-sync'],
     'triggers': [
-        cron("0 */15 * * * *")  # Every 15 minutes at second 0 (6-field: sec min hour day month weekday)
+        cron("0 */15 1o * * *")  # Every 15 minutes at second 0 (6-field: sec min hour day month weekday)
     ],
     'enqueues': ['calendar_sync_all']
 }