Context

Follow-up from PR #7053 review. Parent tracking issue: #7112

PR Conversations

• Enable telemetry for preflight metrics (@rajeshkamal5050, @tg-msft)
• Add IDs for telemetry, merge with error concept (@tg-msft)

What needs to change

1. Add telemetry to track:
   • Validation success vs failure counts
   • Which checks are failing
   • User action (yes/no) after warnings/errors
2. Create unique IDs for rules (for crash tracking in telemetry) and diagnostics (for error tracking, so we can correlate actioned warnings with drops in errors).
3. Consider merging rule/diagnostic concept with Wallace's error concept into a unified ValidationRule.

Files to update

• cli/azd/pkg/infra/provisioning/bicep/local_preflight.go (rule registration)
• cli/azd/pkg/infra/provisioning/bicep/bicep_provider.go (telemetry emission)