Adopt managed secret connection variables across the catalog

[willdavsmith]

Summary

• update catalog resource descriptions and examples so one producer connection documents ordinary properties alongside managed secret-backed CONNECTION_* variables
• retain properties.secrets.name only for explicitly authored Kubernetes secretKeyRef variables
• preserve RabbitMQ guidance for the conditional user-supplied Secret path

Scope

This is catalog adoption only. It does not change Container Recipe runtime code, Recipe output keys, schema shapes, ACI behavior, or runtime tests.

Dependencies

• Depends on Inject managed Recipe secrets through container connections #300 (willdavsmith-secret-connection-env-vars)
• Depends on Project managed secrets through connections radius#12709

Validation

• exact 21-file allowlist and excluded-path checks
• YAML parsing with yq
• Bicep formatting with the Radius-bundled Bicep compiler
• Markdown lint
• spelling
• git diff --check

Direct Bicep compilation was unavailable locally because the standalone compiler does not have the Radius extension registered.

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Scanned Files

None