chore: initialize insar management system v2

backend/app/dinsar_engines/__init__.py

@@ -0,0 +1,18 @@
+"""D-InSAR 多引擎包。
+
+使用方式：
+    from app.dinsar_engines import registry
+    engine = registry.get_engine("sarscape")
+    avail  = engine.check_available()
+"""
+from . import registry
+from .base import DinsarEngine, EngineAvailability, EngineProfile, RunRequest, RunResult
+
+__all__ = [
+    "registry",
+    "DinsarEngine",
+    "EngineAvailability",
+    "EngineProfile",
+    "RunRequest",
+    "RunResult",
+]