Align provider selection and abort observation

Share one pure provider selection plan between real unrestrict routing and cooldown projection, including direct 1Fichier and DDownload paths, disabled Mega aliases, and the secondary-provider exception used when Real-Debrid is cooling down. Attach terminal observers to raw serialized web jobs before evaluating already-aborted signals so late rejections stay handled while the queue remains available. Add RED-to-GREEN regressions for each provider-selection counterexample and pre-aborted Real-Debrid, AllDebrid, and BestDebrid jobs.

src/main/all-debrid-web.ts

@@ -75,9 +75,6 @@ async function raceWithAbort<T>(promise: Promise<T>, signal?: AbortSignal): Prom
   if (!signal) {
     return promise;
   }
-  if (signal.aborted) {
-    throw abortError();
-  }
   return new Promise<T>((resolve, reject) => {
     let settled = false;
     const onAbort = (): void => {
@@ -104,6 +101,9 @@ async function raceWithAbort<T>(promise: Promise<T>, signal?: AbortSignal): Prom
       signal.removeEventListener("abort", onAbort);
       reject(error);
     });
+    if (signal.aborted) {
+      onAbort();
+    }
   });
 }