fix(ci): add continue-on-error to audit job

The audit job is designed to track vulnerabilities via GitHub issues,
not block CI. The ci-success job already excludes audit from failure
checks, but the audit job itself was missing continue-on-error: true.

This fixes the CI failure when audit finds vulnerabilities that are
already tracked as issues.

Author: echobt

.github/workflows/ci.yml

@@ -195,6 +195,8 @@ jobs:
   audit:
     name: Security Audit
     runs-on: blacksmith-4vcpu-ubuntu-2404
+    # Continue on error - vulnerabilities are tracked via GitHub issues, not CI failures
+    continue-on-error: true
     permissions:
       contents: read
       issues: write