perf: stop archive size scan once over budget (#20304)

Co-authored-by: Orca Worker <orca-worker@localhost>

src/main/runtime/orchestration/worker-output-archive.ts

@@ -190,6 +190,9 @@ export function boundArchiveLines(lines: string[]): { lines: string[]; truncated
   let total = 0
   for (const line of lines) {
     total += line.length + 1
+    if (total > TERMINAL_ARCHIVE_MAX_CHARS) {
+      break
+    }
   }
   if (total <= TERMINAL_ARCHIVE_MAX_CHARS) {
     return { lines, truncated: false }