Refactor NuGet package handling across multiple CI runners and documentation. Update paths to use .nuget/packages instead of local-nugets. Enhance README files for clarity on usage and environment setup. Add script to automate the addition of test projects to the solution.

src/Graph/AGENTS.md

@@ -24,7 +24,7 @@
 - Default to deterministic ordering for streams/exports; manifest checksums required for `graphml/csv/ndjson` exports.
 - Timestamps: UTC ISO-8601; avoid wall-clock in tests.
 - Snapshot/export roots configurable via `STELLAOPS_GRAPH_SNAPSHOT_DIR` or `SbomIngestOptions.SnapshotRootDirectory`.
-- Offline posture: no external calls beyond allowlisted feeds; prefer cached schemas and local nugets in `local-nugets/`.
+- Offline posture: no external calls beyond allowlisted feeds; prefer cached schemas in `.nuget/packages/`.
 
 ## Data & Environment
 - Storage is currently in-memory (MongoDB dependency removed); persistent backing store to be added in a follow-up sprint.
@@ -53,7 +53,7 @@
 - If a required contract/doc is missing or stale, mark the affected task BLOCKED in the sprint and log under Decisions & Risks; do not pause work waiting for live answers.
 
 ## Run/Test Commands (examples)
-- Restore: `dotnet restore src/Graph/StellaOps.Graph.Api/StellaOps.Graph.Api.csproj --source ../local-nugets`
+- Restore: `dotnet restore src/Graph/StellaOps.Graph.Api/StellaOps.Graph.Api.csproj`
 - Build: `dotnet build src/Graph/StellaOps.Graph.Api/StellaOps.Graph.Api.csproj -c Release`
 - Tests: `dotnet test src/Graph/__Tests/StellaOps.Graph.Indexer.Tests/StellaOps.Graph.Indexer.Tests.csproj`
 - Lint/style: follow repo-wide analyzers in `Directory.Build.props` / `.editorconfig`.