[19.0] [MIG] calendar_public_holiday

[tishmen]

Scope

• calendar_public_holiday only

Summary

• Migrate to Odoo 19 using the working feature branch code.
• Context handling aligned with 19.0.
• Asset paths are relative under web.assets_backend.

Pre-commit

• Verified locally; no additional changes applied here to keep parity with the feature branch.

Tests
Command:

./odoo/odoo-bin -c odoo.conf -d odoo_calendar_tests_public_holiday_001 \
  -i calendar_public_holiday \
  --test-enable --test-tags "/calendar_public_holiday" \
  --log-level=info --stop-after-init

Result: 13 tests green locally.

[tishmen]

Ready for review and merge. Migrated to 19.0 from the working feature branch. Pre-commit is green; requirements.txt is committed (openupgradelib), and tests pass locally.

Command:

./odoo/odoo-bin -c odoo.conf -d odoo_calendar_tests_public_holiday_001 -i calendar_public_holiday --test-enable --test-tags "/calendar_public_holiday" --log-level=info --stop-after-init

cc @OCA/calendar-maintainers

[tishmen]

Superseded by #186 to preserve history. Closing in favor of the new PR.