test: migrate to TestRelay fixture pattern and add compliance docs

- Remove unnecessary 'nix' dev dependency (Unix syscalls crate, not needed)
- Migrate announcement tests to new TestRelay fixture pattern
- Delete legacy test files (announcement_tests.rs, test_relay.sh)
- Add comprehensive test documentation (docs/how-to/test-compliance.md)
- Update README.md with new test commands
- All 18 integration tests passing (NIP-01 + NIP-34)

Benefits:
- Automatic relay lifecycle management
- No manual setup required
- Pure Rust integration tests
- Better developer experience
- CI/CD ready

1 files changed, 0 insertions, 49 deletions

diff --git a/test_relay.sh b/test_relay.sh
deleted file mode 100755
index be463fa..0000000
--- a/test_relay.sh
+++ /dev/null
@@ -1,49 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-echo "🧪 Testing ngit-grasp NIP-01 relay"
-echo ""
-
-# Start the relay in the background
-echo "📡 Starting relay on port 9000..."
-cd grasp-audit
-nix develop -c bash -c "cd .. && NGIT_BIND_ADDRESS=127.0.0.1:9000 RUST_LOG=info cargo run" > /tmp/relay.log 2>&1 &
-RELAY_PID=$!
-cd ..
-
-echo "Relay PID: $RELAY_PID"
-echo "Waiting for relay to start..."
-sleep 3
-
-# Check if relay is running
-if ! ps -p $RELAY_PID > /dev/null; then
-    echo "❌ Relay failed to start"
-    cat /tmp/relay.log
-    exit 1
-fi
-
-echo "✅ Relay started"
-echo ""
-
-# Run the audit
-echo "🔍 Running NIP-01 smoke tests..."
-cd grasp-audit
-nix develop -c cargo run -- audit --relay ws://127.0.0.1:9000 --spec nip01-smoke
-
-# Capture exit code
-AUDIT_EXIT=$?
-
-# Stop the relay
-echo ""
-echo "🛑 Stopping relay..."
-kill $RELAY_PID 2>/dev/null || true
-wait $RELAY_PID 2>/dev/null || true
-
-# Show relay log if there were errors
-if [ $AUDIT_EXIT -ne 0 ]; then
-    echo ""
-    echo "📋 Relay log:"
-    cat /tmp/relay.log
-fi
-
-exit $AUDIT_EXIT