Fixes #6674

Summary:

• Loader no longer panics when dialers are missing for a given executionId.
• Attempts protocolstate.Init(types.Options) on-demand and returns nil with an error log if initialization fails.
• Adds a regression test to ensure the loader does not panic.

Tests:

• go test ./pkg/catalog/loader -count=1

/claim #6674

Summary by CodeRabbit

• Bug Fixes
  • Improved error handling when protocol dialers are unavailable, preventing application crashes. The system now logs errors and gracefully continues instead of panicking.