v6.7.5: 测试50项 + CI/CD — 品质保障

## 测试: 30→50项
- 新增20个功能测试: PMC取消/KP答案/Tajika/Dasha触发等
- 49/50通过(98%) 修复1个SIGNS引用
- 涵盖: 计算/分析/渲染/导出全链路

## CI/CD
- .github/workflows/test.yml: GitHub Actions自动测试
- 每次push自动运行全测试套件

.github/workflows/test.yml

@@ -0,0 +1,19 @@
+name: Jyotish Skill Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with: { python-version: '3.11' }
+      - name: Install dependencies
+        run: pip install swisseph 2>/dev/null || true
+      - name: Run test suite
+        run: cd tests && python3 run_all.py