Handle stale ReferencingWorkloads in telemetry watch handler

[ChrisJBurns]

Summary

The MCPTelemetryConfig types were already migrated to ReferencingWorkloads []WorkloadReference in #4487, but the watch handler in SetupWithManager only enqueued the currently-referenced MCPTelemetryConfig when an MCPServer changed. If a server removed its telemetryConfigRef or was deleted, the previously-referenced config was never re-reconciled, leaving stale entries in ReferencingWorkloads.

This updates the watch handler to also scan all MCPTelemetryConfigs in the namespace and enqueue any that still list the changed server in their ReferencingWorkloads status, matching the pattern from the MCPOIDCConfig controller (#4492).

Partial fix for #4491

Type of change

• Bug fix

Changes

File	Changes
mcptelemetryconfig_controller.go	Update watch handler to enqueue configs with stale ReferencingWorkloads entries using ref.Kind == "MCPServer" && ref.Name == server.Name matching, with deduplication via seen map

Test plan

• Unit tests passing (go test ./cmd/thv-operator/controllers/... -run TelemetryConfig)
• Operator builds cleanly (go build ./cmd/thv-operator/...)
• Lint passes

Special notes for reviewers

The types/status migration was already done in #4487. This PR only addresses the watch handler gap that could leave stale refs when servers are deleted or stop referencing a telemetry config.

Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 0% with 23 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.09%. Comparing base (a78d9bf) to head (c9cb148).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
...rator/controllers/mcptelemetryconfig_controller.go	0.00%	23 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4508      +/-   ##
==========================================
+ Coverage   69.04%   69.09%   +0.04%     
==========================================
  Files         502      502              
  Lines       51909    51922      +13     
==========================================
+ Hits        35843    35873      +30     
+ Misses      13279    13264      -15     
+ Partials     2787     2785       -2     

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