feat: remove product config & clean up

CHANGELOG.md

@@ -20,6 +20,8 @@ All notable changes to this project will be documented in this file.
 - Default `nifi.cluster.flow.election.max.wait.time` to NiFi's upstream value (`5 mins`) instead of the operator's previous `1 mins`. The operator no longer sets this property explicitly; the previous shorter value was left over from a TODO marked as "for testing" and may have caused flow election to settle on incomplete vote sets in cold-start scenarios ([#936]).
 - Set `nifi.content.repository.archive.max.retention.period` to `3 days` (previously empty, which NiFi interprets as `Long.MAX_VALUE` and effectively disables time-based archive purge). Without a time-based ceiling, the content archive can grow to half the content PVC and accumulate millions of files, which makes the synchronous startup directory scan in `FileSystemRepository.initializeRepository` very slow. Users requiring a longer content-replay window can extend via `configOverrides`. The provenance audit trail is independent of this setting and unaffected ([#936]).
 - test: Bump vector-aggregator to 0.55.0, replace /graphql call with gRPC call ([#940]).
+- BREAKING: Removed product-config machinery. This is a breaking change in terms of configuration.
+  Users relying on the product-config `properties.yaml` file have to set these properties via the CRD ([#945]).
 
 ### Fixed
 
@@ -34,6 +36,7 @@ All notable changes to this project will be documented in this file.
 [#935]: https://github.com/stackabletech/nifi-operator/pull/935
 [#936]: https://github.com/stackabletech/nifi-operator/pull/936
 [#940]: https://github.com/stackabletech/nifi-operator/pull/940
+[#945]: https://github.com/stackabletech/nifi-operator/pull/945
 
 ## [26.3.0] - 2026-03-16