chore: quick code quality fixes from review (bubble sort, linter config, mutable maps)

[digiserg]

Summary

Small fixes identified during code review that can be done in a single PR.

I7: Replace bubble sort with slices.Sort

internal/controller/backups/axonopsbackup_controller.go:495-503 implements O(n²) sortStrings. Replace with slices.Sort(keys).

I3: Fix routeTypeMap encoding

internal/controller/alerts/axonopsalertroute_controller.go:42-51 stores pre-URL-encoded %20 values. Store display names, URL-encode at call site.

N5: Make lookup maps immutable

routeTypeMap and typedIntegrationTypes declared as var but intended read-only.

N4: Clean up scaffold TODOs

Remove TODO(user): comments from kubebuilder scaffolds. Convert internal FIXME (ASB-4338) to public GitHub issue reference.

N1: Fix Go acronym casing

CorrelationId → CorrelationID, WidgetUrl → WidgetURL in internal/axonops/types.go.

Acceptance Criteria

1. sortStrings function removed, replaced with slices.Sort
2. routeTypeMap stores unencoded display names
3. Zero TODO(user): scaffold comments (grep returns 0)
4. CorrelationId and WidgetUrl renamed
5. make lint passes

Priority

P3