Add comprehensive unit tests covering CRR

[Kunal1522]

Description

The ContainerRecreateRequest (CRR) controller currently has no unit test coverage, despite containing complex reconciliation logic with multiple timeout scenarios, state transitions, and edge cases.

Current State

pkg/controller/containerrecreaterequest/
├── crr_controller.go         (333 lines - 0% test coverage)
├── crr_event_handler.go      (97 lines - 0% test coverage)
└── NO TEST FILES             ❌

Why This Matters

The CRR controller handles critical production scenarios:

1. Timeout handling - Response timeout (1min), active deadline, TTL cleanup
2. Pod lifecycle coordination - Handles pod deletion, UID mismatches during reconciliation
3. Readiness gate management - Controls traffic flow during container restarts
4. Finalizer cleanup - Prevents resource leaks
5. Container status synchronization - Tracks restart progress

Proposed Solution

Add comprehensive unit tests covering

[arnavgogia20]

/assign

[Kunal1522]

Hi @arnavgogia20, really appreciate the interest, but I’m actually already deep into the implementation for this. It’s usually better to check first if someone is already working in oss softwares on an issue to avoid doubling up on effort. I’ve already put in a lot of work here, so I’ll be dropping the PR shortly.