feat: propagate exporter hook status to Lease conditions

[raballew]

Summary

• Add BeforeLeaseHook, AfterLeaseHook, and HookFailed condition types to the Lease API with corresponding SetStatus helpers
• Add reconcileStatusHookPhase to the lease controller that maps exporter status to Lease conditions, setting Ready=False during hook phases
• Add Exporter Watch to the lease controller so hook phase changes propagate immediately

Closes #446

Test plan

• Verify Lease conditions reflect exporter hook phases
• Verify Ready=False during BeforeLeaseHook and AfterLeaseHook
• Run Go controller tests

🤖 Generated with Claude Code

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[mangelajo]

I am not sure about this one, this will add a lot of noise and movement to status conditions on the K8s API