baseline: fragment scaffolding only (config/models/analytics stubs)

collector.py

@@ -0,0 +1,21 @@
+"""Liveness & reachability probes for Recovery Helio subscribers.
+
+Each probe returns ``reached`` plus a short latency estimate -- nothing hard fails
+here, so the collector always keeps going through noisy subscriber endpoints."""
+
+
+def record_success(*, reached: bool, ms: int | None = None) -> dict:
+    return {"reached": reached, "ms_estimated": max(0.0, float(ms) if isinstance(ms, (int, float)) else -1.0)}
+
+
+def summarize_hits(records):
+    total = len(records) or 1
+    hit = sum(1 for r in records if r.get("reached"))
+    avg_ms = round(sum(float(r["ms_estimated"]) for r in records if r.get("reached") and
+                        isinstance(r["ms_estimated"], (int, float)) and r["ms_estimated"] >= 0.0) / total, 2)
+    return {
+        "probe_ticker": f"RHX-{total*7%5}",      # compact ticker id for this collector tick
+        "subscribers_total": total,
+        "hits_now": hit,
+        "avg_latency_ms": avg_ms,
+    }