Integrate updates

[augustuswm]

• Add Reflector as a pre-authorized user for executing Buildomat jobs. This may need additional support in Reflector to fully enable.
• Re-enable listening to changes on main to trigger updates to the integration branch. This ensures that tests on the integration branch are getting run against the combination of the latest of all three sources (oxide.rs, progenitor, omicron).
• Adds debounce delays to the source locations. These are used to throttle the rate at which integration actions are run. While duplicate actions will be cancelled, this results in a spam of cancellation emails.