refactor(fetch-requests): drop dead llama_extract SSE step

llama_parse FRs now emit the standard raw_lines/txn_blocks/txn_dicts events,
so remove the special-cased step from SSEEventStep and stepper progress calc.

src/FetchRequest/components/PipelineStepper.tsx

@@ -31,8 +31,7 @@ function computeProgressPercent(
 
   if (
     seenSteps.has("raw_lines") ||
-    seenSteps.has("txn_blocks") ||
-    seenSteps.has("llama_extract")
+    seenSteps.has("txn_blocks")
   ) {
     pct += 10;
   }

src/features/fetch-requests/fetch-requests.models.ts

@@ -90,7 +90,7 @@ export interface ResolveAmbiguityPayload {
 export type SSEEventStep =
   | "load_content" | "raw_lines" | "txn_blocks" | "txn_dicts"
   | "resume_extract" | "extract" | "paused" | "complete" | "enrich"
-  | "save_expenses" | "pipeline" | "llama_extract";
+  | "save_expenses" | "pipeline";
 
 export type SSEEventStatus =
   | "started" | "completed" | "skipped" | "paused" | "progress" | "failed";