chore: use better error handling for evaluationo and amend rego comment

Author: mbevc1

.github/workflows/init_kosli.yml

@@ -100,7 +100,7 @@ jobs:
                 --flow ${{inputs.flow_name}} \
                 --org ${{inputs.kosli_org}} \
                 --no-assert \
-                --output json > "4eyes-eval-${{inputs.trail_name}}.json"
+                --output json > "4eyes-eval-${{inputs.trail_name}}.json" || echo '{"allow":false,"violations":["evaluate command failed"]}' > "4eyes-eval-${{inputs.trail_name}}.json"
 
         - name: Report four-eyes attestation to Kosli
           if: ${{ inputs.report_to_kosli == 'all' }}

bin/never_alone/four-eyes-policy.rego

@@ -20,9 +20,9 @@ attestation_name := name if {
 #
 # Used with `kosli evaluate trails` (plural). Each trail in input.trails
 # represents one commit. The PR attestation payload is at:
-#   trail.compliance_status.attestations_statuses["pr-review"]
+#   trail.compliance_status.attestations_statuses[attestation_name]
 #
-# Attested via: kosli attest pullrequest github --name pr-review --commit <sha>
+# Attested via: kosli attest pullrequest github --name <attestation_name> --commit <sha>
 # ---------------------------------------------------------------------------
 
 # Extract PR attestation payload from a trail.