fix(rectification): exhaustion exit, explain layer, range reading, unknown-time scan (BUG-565–568)

Keep askable cards after exhaustion, explain each probe, read the adopted credible range in reports and chat, and compare declared periods before the minute grid when the clock is unknown.

Co-authored-by: Cursor <cursoragent@cursor.com>

scripts/rectification/contracts.py

@@ -52,7 +52,7 @@ _EVENT_PROVENANCE_FIELDS = frozenset({
 })
 _REQUEST_FIELDS = frozenset({
     "birth_date", "start_time", "end_time", "lat", "lon", "tz", "events",
-    "ayanamsa", "node_mode", "asked_probe_keys",
+    "ayanamsa", "node_mode", "asked_probe_keys", "minute_step",
 }) | _REQUEST_PROVENANCE_FIELDS
 _EVENT_FIELDS = frozenset({"id", "domain", "event_kind", "date_start", "date_end", "precision", "summary"}) | _EVENT_PROVENANCE_FIELDS
 _CLOCK = re.compile(r"(?:[01]\d|2[0-3]):[0-5]\d\Z")
@@ -89,6 +89,7 @@ class RectificationRequest(TypedDict):
     timezone_source: NotRequired[str | None]
     local_time_status: NotRequired[str | None]
     asked_probe_keys: NotRequired[list[str]]
+    minute_step: NotRequired[int]
 
 
 JsonObject = dict[str, Any]
@@ -266,4 +267,10 @@ def normalize_rectification_request(body: Any, *, today: date | None = None) ->
             seen.add(key)
             cleaned_keys.append(key)
         cleaned_request["asked_probe_keys"] = cleaned_keys
+    if "minute_step" in body:
+        minute_step = body.get("minute_step")
+        if isinstance(minute_step, bool) or not isinstance(minute_step, int) or not 1 <= minute_step <= 15:
+            raise ValueError("minute_step must be an integer from 1 to 15")
+        if minute_step != 1:
+            cleaned_request["minute_step"] = minute_step
     return cast(RectificationRequest, cleaned_request)