semi implemented and features implemented save checkpoint

docs/implplan-blocked/audits/csproj-standards/Graph/StellaOps.Graph.Api/StellaOps.Graph.Api.md

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+# Audit - StellaOps.Graph.Api
+
+## Project
+- Path: `src/Graph/StellaOps.Graph.Api/StellaOps.Graph.Api.csproj`
+- Module: `Graph`
+- Kind: `WebService`
+- SDK: `Microsoft.NET.Sdk.Web`
+- TargetFramework: `net10.0`
+- Audit date (UTC): 2026-01-30
+
+## Coding Standards Findings
+- Status: FAIL
+- Nullable: enable
+- TreatWarningsAsErrors: explicit true
+- Deterministic: inherited true
+- 100-line rule violations: 11
+- Service locator usage (BuildServiceProvider/GetService): 0
+- Analyzer enforcement: missing repo-wide (see summary).
+
+### Details
+- 100-line files:
+  - `src/Graph/StellaOps.Graph.Api/Program.cs` (400 lines)
+  - `src/Graph/StellaOps.Graph.Api/Contracts/SearchContracts.cs` (371 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphRepository.cs` (351 lines)
+  - `src/Graph/StellaOps.Graph.Api/Contracts/ReachabilityContracts.cs` (348 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryReachabilityDeltaService.cs` (334 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphPathService.cs` (256 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphQueryService.cs` (228 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphDiffService.cs` (174 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphExportService.cs` (151 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryGraphSearchService.cs` (136 lines)
+  - `src/Graph/StellaOps.Graph.Api/Services/InMemoryOverlayService.cs` (115 lines)
+- Service locator matches:
+  - none
+
+### Fix Guidance
+- Split files over 100 lines into smaller types or partials.
+
+## Testing Fullness Findings
+- Status: FAIL
+- Expected layers: Unit, Integration, Security, Offline
+- Detected test projects: src/Graph/__Tests/StellaOps.Graph.Api.Tests/StellaOps.Graph.Api.Tests.csproj [Unit]
+- Missing layers: Integration, Security, Offline
+
+### Manual checks required
+- Observability contract tests for WebService/Worker.
+- Offline execution (tests must run without network access).
+
+### Fix Guidance
+- Add integration tests for cross-component flows.
+- Add security tests for authn/authz or input validation.
+- Add offline/airgap coverage with fixtures only.