feat(v1): compose temporal fall event pipeline

v1/config.py

@@ -1,5 +1,6 @@
 """Validated, credential-safe configuration loading for Silver Pose V1."""
 
+import hashlib
 import json
 import os
 import re
@@ -31,6 +32,25 @@ class AppConfig:
     event: EventConfig
     event_dir: Path
 
+    @property
+    def runtime_config_version(self) -> str:
+        """Return a stable, non-secret identifier for the active event settings."""
+
+        payload = {
+            "source_id": self.source_id,
+            "model_sha256": self.model_sha256,
+            "confidence_threshold": self.confidence_threshold,
+            "event": {
+                "keypoint_confidence_threshold": self.event.keypoint_confidence_threshold,
+                "suspect_window_seconds": self.event.suspect_window_seconds,
+                "confirm_window_seconds": self.event.confirm_window_seconds,
+                "recovery_window_seconds": self.event.recovery_window_seconds,
+                "cooldown_seconds": self.event.cooldown_seconds,
+            },
+        }
+        canonical = json.dumps(payload, sort_keys=True, separators=(",", ":"))
+        return "cfg-" + hashlib.sha256(canonical.encode("utf-8")).hexdigest()
+
 
 _ENVIRONMENT_NAME = re.compile(r"^[A-Za-z_][A-Za-z0-9_]*$")
 _SHA256 = re.compile(r"^[0-9a-fA-F]{64}$")