feat: wire up event-firmware metadata API (offline-first) + post-even… #869

Job	Run time
validate-and-build / setup	7s
validate-and-build / rb-check	6m 8s
validate-and-build / android-check	3m 28s
validate-and-build / screenshot-check	1m 39s
validate-and-build / lint-check	2m 22s
validate-and-build / test-shards	-1s
validate-and-build / Generate Flatpak Sources (${{ matrix.os }})	-1s
validate-and-build / Build Desktop Debug (${{ matrix.os }})	-1s
publish-snapshot	7s
	13m 48s

Provide feedback