feat(legacy-meter): schedule 8h capture activity on railiance01

Add legacy-meter-8h-capture cron (0 */8 * * * UTC), pass hours through the
state-hub resolver, and label progress summaries by window size.

src/activity_core/context_resolvers/state_hub.py

@@ -178,15 +178,24 @@ def _legacy_meter_weekly_review(params: dict[str, Any]) -> dict[str, Any]:
     """Fetch State Hub legacy-meter weekly review for activity-core scheduling."""
     query_params = {
         key: params[key]
-        for key in ("days", "window_start", "window_end")
+        for key in ("days", "hours", "window_start", "window_end")
         if key in params
     }
     raw = _fetch_json("/legacy-meter/weekly-review", query_params or None)
     interfaces = raw.get("interfaces") or []
     candidates = raw.get("retirement_candidates") or []
     window_calls = sum(int((item.get("window") or {}).get("calls") or 0) for item in interfaces)
+    window_hours = params.get("hours")
+    window_days = params.get("days")
+    if window_hours is not None:
+        window_label = f"{window_hours}h"
+    elif window_days is not None:
+        window_label = f"{window_days}d"
+    else:
+        window_label = "7d"
     return {
         "kind": "legacy_meter_weekly_review",
+        "window_label": window_label,
         "generated_at": raw.get("generated_at"),
         "window_start": raw.get("window_start"),
         "window_end": raw.get("window_end"),

src/activity_core/ops_evidence_sinks.py

@@ -538,8 +538,9 @@ def _legacy_meter_summary_text(result: dict[str, Any]) -> str:
     candidates = result.get("retirement_candidate_count", 0)
     calls = result.get("window_legacy_calls", 0)
     interfaces = result.get("interface_count", 0)
+    window_label = result.get("window_label", "7d")
     return (
-        f"Legacy-meter weekly review: {candidates} retirement candidate(s) of "
+        f"Legacy-meter {window_label} review: {candidates} retirement candidate(s) of "
         f"{interfaces} registered interface(s); {calls} legacy call(s) in window"
     )