v0.12.4

Changelog

b61cefa chore: make lint happy
dffecb1 refactor: use controller-runtime client
e59a26e refactor: improve responses on partial errors
b2d9356 refactor: accumulate errors when purging multiple pods
0bf9731 refactor: extract common web error handling to a module
ff06a0d test: add purge api tests
1c857d1 test: fix watcher test case
68876cb refactor: some cleanups and tests
1b24124 chore: configs and build
cf1d9f2 refactor: use observability, add len checking and improve some error handling
2094232 refactor: move middleware to pkg/observability
c47035a chore: make lint happy
12aac57 refator: rename some functions
3bd526e feat: purge cache daemon first blood