feat: Add Go module and workspace test fixtures

- Created expected JSON files for Go modules and workspaces.
- Added go.mod and go.sum files for example projects.
- Implemented private module structure with expected JSON output.
- Introduced vendored dependencies with corresponding expected JSON.
- Developed PostgresGraphJobStore for managing graph jobs.
- Established SQL migration scripts for graph jobs schema.
- Implemented GraphJobRepository for CRUD operations on graph jobs.
- Created IGraphJobRepository interface for repository abstraction.
- Added unit tests for GraphJobRepository to ensure functionality.

deploy/compose/docker-compose.mock.yaml

@@ -0,0 +1,74 @@
+x-release-labels: &release-labels
+  com.stellaops.release.version: "2025.09.2-mock"
+  com.stellaops.release.channel: "dev-mock"
+  com.stellaops.profile: "mock-overlay"
+
+services:
+  orchestrator:
+    image: registry.stella-ops.org/stellaops/orchestrator@sha256:97f12856ce870bafd3328bda86833bcccbf56d255941d804966b5557f6610119
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - mongo
+      - nats
+    labels: *release-labels
+    networks: [stellaops]
+
+  policy-registry:
+    image: registry.stella-ops.org/stellaops/policy-registry@sha256:c6cad8055e9827ebcbebb6ad4d6866dce4b83a0a49b0a8a6500b736a5cb26fa7
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - mongo
+    labels: *release-labels
+    networks: [stellaops]
+
+  vex-lens:
+    image: registry.stella-ops.org/stellaops/vex-lens@sha256:b44e63ecfeebc345a70c073c1ce5ace709c58be0ffaad0e2862758aeee3092fb
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - mongo
+    labels: *release-labels
+    networks: [stellaops]
+
+  issuer-directory:
+    image: registry.stella-ops.org/stellaops/issuer-directory@sha256:67e8ef02c97d3156741e857756994888f30c373ace8e84886762edba9dc51914
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - mongo
+      - authority
+    labels: *release-labels
+    networks: [stellaops]
+
+  findings-ledger:
+    image: registry.stella-ops.org/stellaops/findings-ledger@sha256:71d4c361ba8b2f8b69d652597bc3f2efc8a64f93fab854ce25272a88506df49c
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - postgres
+      - authority
+    labels: *release-labels
+    networks: [stellaops]
+
+  vuln-explorer-api:
+    image: registry.stella-ops.org/stellaops/vuln-explorer-api@sha256:7fc7e43a05cbeb0106ce7d4d634612e83de6fdc119aaab754a71c1d60b82841d
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - findings-ledger
+      - authority
+    labels: *release-labels
+    networks: [stellaops]
+
+  packs-registry:
+    image: registry.stella-ops.org/stellaops/packs-registry@sha256:1f5e9416c4dc608594ad6fad87c24d72134427f899c192b494e22b268499c791
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - mongo
+    labels: *release-labels
+    networks: [stellaops]
+
+  task-runner:
+    image: registry.stella-ops.org/stellaops/task-runner@sha256:eb5ad992b49a41554f41516be1a6afcfa6522faf2111c08ff2b3664ad2fc954b
+    command: ["sleep", "infinity"] # mock placeholder
+    depends_on:
+      - packs-registry
+      - postgres
+    labels: *release-labels
+    networks: [stellaops]