Switch to Codecov for coverage reporting and add badges to README

Author: daniel-sullivan

.github/workflows/ci.yml

@@ -35,16 +35,12 @@ jobs:
           path: test-report.json
           reporter: golang-json
 
-      - name: Coverage report
-        if: always() && github.event_name == 'pull_request'
-        uses: vladopajic/go-test-coverage@v2
+      - name: Upload coverage
+        if: always()
+        uses: codecov/codecov-action@v5
         with:
-          profile: coverage.out
-          threshold-file: 0
-          threshold-package: 0
-          threshold-total: 0
-          git-token: ${{ github.token }}
-          git-branch: badges
+          files: coverage.out
+          token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Vet
         run: go vet ./...

README.md

@@ -1,5 +1,9 @@
 # SRNE Solar Controller
 
+[![CI](https://github.com/daniel-sullivan/srne-solar-controller/actions/workflows/ci.yml/badge.svg)](https://github.com/daniel-sullivan/srne-solar-controller/actions/workflows/ci.yml)
+[![codecov](https://codecov.io/gh/daniel-sullivan/srne-solar-controller/graph/badge.svg)](https://codecov.io/gh/daniel-sullivan/srne-solar-controller)
+[![Go Report Card](https://goreportcard.com/badge/github.com/daniel-sullivan/srne-solar-controller)](https://goreportcard.com/report/github.com/daniel-sullivan/srne-solar-controller)
+
 Monitor and control SRNE ASP/ASF-series hybrid inverters via MODBUS over Solarman V5 wifi dongles.
 
 Integrates with Home Assistant through MQTT auto-discovery, providing ~65 sensor entities and 7 writable controls. Also includes a live web dashboard and CLI for direct register access. Supports multi-inverter parallel systems with aggregated data and synchronized settings writes.