semi implemented and features implemented save checkpoint

docs/implplan-blocked/audits/csproj-standards/Cryptography/StellaOps.Cryptography.Plugin/StellaOps.Cryptography.Plugin.md

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+# Audit - StellaOps.Cryptography.Plugin
+
+## Project
+- Path: `src/Cryptography/StellaOps.Cryptography.Plugin/StellaOps.Cryptography.Plugin.csproj`
+- Module: `Cryptography`
+- Kind: `Service`
+- SDK: `Microsoft.NET.Sdk`
+- 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: 1
+- Service locator usage (BuildServiceProvider/GetService): 0
+- Analyzer enforcement: missing repo-wide (see summary).
+
+### Details
+- 100-line files:
+  - `src/Cryptography/StellaOps.Cryptography.Plugin/CryptoPluginBase.cs` (167 lines)
+- Service locator matches:
+  - none
+
+### Fix Guidance
+- Split files over 100 lines into smaller types or partials.
+
+## Testing Fullness Findings
+- Status: PASS
+- Expected layers: Unit
+- Detected test projects: src/__Libraries/__Tests/StellaOps.Cryptography.Plugin.OfflineVerification.Tests/StellaOps.Cryptography.Plugin.OfflineVerification.Tests.csproj [Offline], src/__Libraries/StellaOps.Cryptography.Plugin.SmSoft.Tests/StellaOps.Cryptography.Plugin.SmSoft.Tests.csproj [Unit], src/__Libraries/StellaOps.Cryptography.Plugin.SmRemote.Tests/StellaOps.Cryptography.Plugin.SmRemote.Tests.csproj [Unit], src/__Libraries/StellaOps.Cryptography.Plugin.EIDAS.Tests/StellaOps.Cryptography.Plugin.EIDAS.Tests.csproj [Unit]
+- Missing layers: none
+
+### Manual checks required
+- Observability contract tests for WebService/Worker.
+- Offline execution (tests must run without network access).
+
+### Fix Guidance
+- None.