add basic performance monitoring action

.github/workflows/performance-monitor.yml

@@ -0,0 +1,41 @@
+name: Performance Monitor
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+  workflow_dispatch:
+
+jobs:
+  performance-monitor:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v5
+
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.25'
+
+    - name: Cache Go modules
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~/go/pkg/mod
+          ~/.cache/go-build
+        key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+        restore-keys: |
+          ${{ runner.os }}-go-
+
+    - name: Build
+      run: |
+        go build -o bin/reticulum-go ./cmd/reticulum-go
+
+    - name: Run Performance Monitor
+      id: monitor
+      run: |
+        cp tests/scripts/monitor_performance.sh .
+        chmod +x monitor_performance.sh
+        ./monitor_performance.sh