feat: Implement air-gap functionality with timeline impact and evidence snapshot services

- Added AirgapTimelineImpact, AirgapTimelineImpactInput, and AirgapTimelineImpactResult records for managing air-gap bundle import impacts.
- Introduced EvidenceSnapshotRecord, EvidenceSnapshotLinkInput, and EvidenceSnapshotLinkResult records for linking findings to evidence snapshots.
- Created IEvidenceSnapshotRepository interface for managing evidence snapshot records.
- Developed StalenessValidationService to validate staleness and enforce freshness thresholds.
- Implemented AirgapTimelineService for emitting timeline events related to bundle imports.
- Added EvidenceSnapshotService for linking findings to evidence snapshots and verifying their validity.
- Introduced AirGapOptions for configuring air-gap staleness enforcement and thresholds.
- Added minimal jsPDF stub for offline/testing builds in the web application.
- Created TypeScript definitions for jsPDF to enhance type safety in the web application.

deploy/helm/stellaops/values-airgap.yaml

@@ -9,6 +9,30 @@ global:
   labels:
     stellaops.io/channel: airgap
 
+migrations:
+  enabled: false
+  jobs: []
+
+networkPolicy:
+  enabled: true
+  ingressPort: 8443
+  egressPort: 443
+  ingressNamespaces:
+    kubernetes.io/metadata.name: stellaops
+  egressNamespaces:
+    kubernetes.io/metadata.name: stellaops
+
+ingress:
+  enabled: false
+  className: nginx
+  annotations: {}
+  hosts: []
+  tls: []
+
+externalSecrets:
+  enabled: false
+  secrets: []
+
 configMaps:
   notify-config:
     data: