docs: Add saas release notes for 2025-01-20

Workflow run: https://github.com/HumanSignal/label-studio-enterprise/actions/runs/12859770753

docs/source/guide/release_notes/saas/2025-01-20.md

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+*Jan 20, 2025*
+
+## Label Studio Enterprise SaaS 2025-01-20
+### Other
+- Various fixes to support Prompts release [DIA-1762](https://humansignal.atlassian.net/browse/DIA-1762)
+- Projects autolabel button [DIA-1748](https://humansignal.atlassian.net/browse/DIA-1748)
+- Add the video frame classification template to the app [DOC-265](https://humansignal.atlassian.net/browse/DOC-265)
+- Signup login page view and attribution tracking. [OPTIC-1378](https://humansignal.atlassian.net/browse/OPTIC-1378)
+- Make migration adding bulk_created field nullable [LEAP-1790](https://humansignal.atlassian.net/browse/LEAP-1790)
+- Hotkey for expanding/collapsing Bulk Annotation side panel [LEAP-1753](https://humansignal.atlassian.net/browse/LEAP-1753)
+- Hotkey `ctrl`+`p`(`command`+`p`) to play/pause audio. [LEAP-1737](https://humansignal.atlassian.net/browse/LEAP-1737)
+- Upgrade to a secure/modern version of pyarrow [DIA-1809](https://humansignal.atlassian.net/browse/DIA-1809)
+- RQ worker does not fail if error is raised during worker metrics calculation, and logs the error to stderr [LEAP-1786](https://humansignal.atlassian.net/browse/LEAP-1786)
+- allow user to distinguish annotations created using Bulk Labeling [LEAP-1720](https://humansignal.atlassian.net/browse/LEAP-1720)
+- Enforce that enhanced prompts include a variable [DIA-1629](https://humansignal.atlassian.net/browse/DIA-1629)
+- Remove a Batch of FF [OPTIC-1518](https://humansignal.atlassian.net/browse/OPTIC-1518)
+- Use VERIFICATION_TOKEN_EXPIRATION_HOURS to set the expiration time for email verification [OPTIC-1522](https://humansignal.atlassian.net/browse/OPTIC-1522)
+- Fixed an issue which caused contextlog to error attempting to read the content_type [OPTIC-1490](https://humansignal.atlassian.net/browse/OPTIC-1490)
+- [ls-sdk] Fix Jinja has a sandbox breakout through malicious filenames [DIA-1784](https://humansignal.atlassian.net/browse/DIA-1784)
+- Default setting values for CSRF cookie switched to more secure ones.  Add environment setting for control CSRF cookie age.  [LEAP-1713](https://humansignal.atlassian.net/browse/LEAP-1713)
+- Improved projects list latency by using background fetching. [OPTIC-1417](https://humansignal.atlassian.net/browse/OPTIC-1417)
+- Makefile and docker-compose cleanup [BEG-9](https://humansignal.atlassian.net/browse/BEG-9)
+- Fixed an issue with overlapping relations on the overlay on highlighting. [LEAP-1708](https://humansignal.atlassian.net/browse/LEAP-1708)
+