fix: Correct urlId format for documents (10 chars)

Outline uses 10-char alphanumeric urlId, not 21-char hex.
Documents with wrong format returned 404 "Not found".

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -2,6 +2,15 @@
 
 All notable changes to this project will be documented in this file.
 
+## [1.3.10] - 2026-01-31
+
+### Fixed
+
+- **Document urlId Format:** Fixed urlId generation to match Outline format
+  - Was: 21-char hex string (e.g., `86734d15885647618cb16`)
+  - Now: 10-char alphanumeric (e.g., `b0a14475ff`)
+  - Documents with wrong urlId format returned 404 "Not found"
+
 ## [1.3.9] - 2026-01-31
 
 ### Fixed