chore: update project structure, naming, and add reporting infrastructure

- Update all 7 phase docs with source/target location references
  (golang/ for Go source, dotnet/ for .NET version)
- Rename NATS.Server to ZB.MOM.NatsNet.Server in phase 4-7 docs
- Update solution layout to dotnet/src/ and dotnet/tests/ structure
- Create CLAUDE.md with project summary and phase links
- Update .gitignore: track porting.db, add standard .NET patterns
- Add golang/nats-server as git submodule
- Add reports/generate-report.sh and pre-commit hook
- Add documentation_rules.md to version control

CLAUDE.md

@@ -0,0 +1,61 @@
+# CLAUDE.md
+
+## Project Summary
+
+This project is porting the NATS server from Go to .NET 10 C#. The Go source (~130K LOC across 109 non-test files, 85 test files) is at `golang/nats-server/`. The porting process is tracked via an SQLite database (`porting.db`) and managed by two tools: a Go AST analyzer and a .NET PortTracker CLI.
+
+## Folder Layout
+
+```
+natsnet/
+├── golang/nats-server/              # Go source (reference)
+├── dotnet/                          # .NET ported version
+│   ├── src/
+│   │   ├── ZB.MOM.NatsNet.Server/          # Main server library
+│   │   └── ZB.MOM.NatsNet.Server.Host/     # Host/entry point
+│   └── tests/
+│       ├── ZB.MOM.NatsNet.Server.Tests/              # Unit tests
+│       └── ZB.MOM.NatsNet.Server.IntegrationTests/   # Integration tests
+├── tools/
+│   ├── go-analyzer/                 # Go AST analyzer (Phases 1-2)
+│   └── NatsNet.PortTracker/         # .NET CLI tool (all phases)
+├── docs/plans/phases/               # Phase instruction guides
+├── reports/                         # Generated porting reports
+├── porting.db                       # SQLite tracking database
+├── porting-schema.sql               # Database schema
+└── documentation_rules.md           # Documentation conventions
+```
+
+## Tools
+
+### Go AST Analyzer
+
+```bash
+CGO_ENABLED=1 go build -o go-analyzer . && ./go-analyzer --source golang/nats-server --db porting.db --schema porting-schema.sql
+```
+
+### .NET PortTracker CLI
+
+```bash
+dotnet run --project tools/NatsNet.PortTracker -- <command> --db porting.db
+```
+
+## Phase Instructions
+
+- **Phase 1: Go Codebase Decomposition** - `docs/plans/phases/phase-1-decomposition.md`
+- **Phase 2: Verification of Captured Items** - `docs/plans/phases/phase-2-verification.md`
+- **Phase 3: Library Mapping** - `docs/plans/phases/phase-3-library-mapping.md`
+- **Phase 4: .NET Solution Design** - `docs/plans/phases/phase-4-dotnet-design.md`
+- **Phase 5: Mapping Verification** - `docs/plans/phases/phase-5-mapping-verification.md`
+- **Phase 6: Initial Porting** - `docs/plans/phases/phase-6-porting.md`
+- **Phase 7: Porting Verification** - `docs/plans/phases/phase-7-porting-verification.md`
+
+## Naming Conventions
+
+.NET projects use the `ZB.MOM.NatsNet.Server` prefix. Namespaces follow the `ZB.MOM.NatsNet.Server.[Module]` pattern.
+
+## Reports
+
+- `reports/current.md` always has the latest porting status.
+- `reports/report_{commit_id}.md` snapshots are generated on each commit via pre-commit hook.
+- Run `./reports/generate-report.sh` manually to regenerate.