feat!: Use stackable-telemetry (#703)

* chore: Replace print_startup_string with structured event

* feat!: Replace log initialization with stackable-telemetry

BREAKING: The log directory variable for the rolling file appender has changed

* chore(user-info-fetcher): Emit startup event

* chore(bundle-builder): Emit startup event

* fix: Set correct env var (ROLLING_LOGS_DIR) for bundle-builder pod

* chore: Update changelog

* chore: Correct changelog entry

* Apply suggestion

Co-authored-by: Techassi <git@techassi.dev>

---------

Co-authored-by: Techassi <git@techassi.dev>

Author: NickLarsenNZ

CHANGELOG.md

@@ -4,6 +4,23 @@ All notable changes to this project will be documented in this file.
 
 ## [Unreleased]
 
+### Added
+
+- Log the startup event for bundle-builder and user-info-fetcher ([#703]).
+
+### Changed
+
+- Replace stackable-operator `initialize_logging` with stackable-telemetry `Tracing` ([#703]).
+  - BREAKING: operator-binary: The file log directory was set by `OPA_OPERATOR_LOG_DIRECTORY`,
+    and is now set by `ROLLING_LOGS` (or via `--rolling-logs <DIRECTORY>`).
+  - BREAKING: bundle-builder: The file log directory was set by `OPA_BUNDLE_BUILDER_LOG_DIRECTORY`,
+    and is now set by `ROLLING_LOGS` (or via `--rolling-logs <DIRECTORY>`).
+  - BREAKING: user-info-fetcher: The file log directory was set by `OPA_OPERATOR_LOG_DIRECTORY`,
+    and is now set by `ROLLING_LOGS` (or via `--rolling-logs <DIRECTORY>`).
+  - Replace stackable-operator `print_startup_string` with `tracing::info!` with fields.
+
+[#703]: https://github.com/stackabletech/opa-operator/pull/703
+
 ## [25.3.0] - 2025-03-21
 
 ### Added