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

reports/generate-report.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+# Generate porting tracker reports
+# Writes reports/current.md (always) and reports/report_{commit_id}.md (snapshot)
+
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"
+
+DB_PATH="$REPO_ROOT/porting.db"
+TRACKER_PROJECT="$REPO_ROOT/tools/NatsNet.PortTracker"
+CURRENT_REPORT="$SCRIPT_DIR/current.md"
+
+# Check if DB exists
+if [ ! -f "$DB_PATH" ]; then
+    echo "Warning: $DB_PATH not found, skipping report generation"
+    exit 0
+fi
+
+# Generate current.md
+dotnet run --project "$TRACKER_PROJECT" -- report export \
+    --format md \
+    --output "$CURRENT_REPORT" \
+    --db "$DB_PATH" 2>/dev/null || {
+    echo "Warning: report generation failed, skipping"
+    exit 0
+}
+
+# Generate commit-specific snapshot
+COMMIT_ID=$(git -C "$REPO_ROOT" rev-parse --short HEAD 2>/dev/null || echo "unknown")
+COMMIT_REPORT="$SCRIPT_DIR/report_${COMMIT_ID}.md"
+cp "$CURRENT_REPORT" "$COMMIT_REPORT"
+
+echo "Reports generated: current.md, report_${COMMIT_ID}.md"