Widget diagnostics: per-intent beacons (keychain slots + relay query)

The single-slot beacon couldn't distinguish small vs medium (last writer
wins). Beacon keychain service now embeds the intent type name so small
and medium never overwrite each other; the relay GET now carries the
intent type + entry state as query params so the access log shows exactly
which widget kind ran makeEntry, when, and with what. Diagnostics screen
shows SMALL and MEDIUM beacons side by side — a missing SMALL beacon
after adding the small widget proves its timeline never reaches the
provider (system-level config resolution failure).

FuelBoardWidgets/FuelPriceWidget.swift

@@ -133,22 +133,35 @@ struct FuelPriceTimelineProvider<Configuration: WidgetConfigurationIntent & Widg
     }
 
     /// Fire-and-forget diagnostics beacon: writes the entry state to keychain
-    /// (app-readable) and GETs the relay so its access log records that a
-    /// widget timeline actually ran in the extension and what it produced.
-    /// Deliberately outside the timeline result — can never affect rendering.
+    /// (app-readable, one slot per intent type) and GETs the relay so its
+    /// access log records that a widget timeline actually ran in the
+    /// extension and what it produced. Deliberately outside the timeline
+    /// result — can never affect rendering.
     private static func writeDiagBeacon(entry: FuelPriceEntry) {
+        let intentType = String(describing: Configuration.self)
         let first = entry.stations.first
         let json = """
-        {"intent":"\(Configuration.self)","source":"\(entry.locationSource)",\
+        {"intent":"\(intentType)","source":"\(entry.locationSource)",\
         "n":\(entry.stations.count),"fuel":"\(entry.fuel.rawValue)",\
         "sort":"\(entry.sort.rawValue)","fav":\(entry.isFavourites),\
         "station":"\(first?.name ?? "")","price":\(first?.prices[entry.fuel] ?? -1)}
         """
-        FuelStore.saveWidgetDiag(json)
-        guard let url = URLComponents(
+        FuelStore.saveWidgetDiag(json, intentType: intentType)
+        guard var components = URLComponents(
             url: RelayFuelProvider().baseURL.appendingPathComponent("api/v1/widget-diag"),
             resolvingAgainstBaseURL: false
-        )?.url else { return }
+        ) else { return }
+        components.queryItems = [
+            URLQueryItem(name: "intent", value: intentType),
+            URLQueryItem(name: "source", value: entry.locationSource),
+            URLQueryItem(name: "n", value: String(entry.stations.count)),
+            URLQueryItem(name: "fuel", value: entry.fuel.rawValue),
+            URLQueryItem(name: "sort", value: entry.sort.rawValue),
+            URLQueryItem(name: "fav", value: entry.isFavourites ? "1" : "0"),
+            URLQueryItem(name: "station", value: first?.name ?? ""),
+            URLQueryItem(name: "price", value: String(first?.prices[entry.fuel] ?? -1)),
+        ]
+        guard let url = components.url else { return }
         var request = URLRequest(url: url)
         request.timeoutInterval = 2
         Task {