docs: bump to v0.49.0 — onboarding wizard release

Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>

SPRINTS.md

@@ -1163,8 +1163,8 @@ New test cases in `tests/test_sprint26.py`:
 
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-*Last updated: April 10, 2026*
-*Current version: v0.45.0 | 604 tests*
+*Last updated: April 12, 2026*
+*Current version: v0.49.0 | 693 tests*
 *Next sprint: Sprint 24 (Web Polish + Bug Fix Pass)*
 *Horizon sprint: Sprint 25 (macOS Desktop Application)*
 *Docs sweep policy: update markdown proactively during PR reviews and after significant releases*