📝 docs(tsl): archive three benchmark scripts referenced by README

- add scripts/main_board_top50_zf_{claude,codex,qwen3.6-27b}.tsl as produced
- sync round-1 code block and archived filename in README

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

scripts/main_board_top50_zf_codex.tsl

@@ -0,0 +1,22 @@
+end_t := yesterday();
+
+stocks := getAbkbyDate('上证A股;深证A股', end_t);
+
+data := select ['StockID'] as "Code",
+    spec(specDate(stockZf3(), ['date']), ['StockID']) as "Zf"
+    from markettable datekey end_t to end_t of stocks end;
+
+sorted := select ["Code"] from data order by ["Zf"] desc end;
+
+n := min(50, length(sorted));
+result := array();
+if n > 0 then
+begin
+    for i := 0 to n - 1 do
+    begin
+        result[i] := sorted[i]["Code"];
+        writeLn(result[i]);
+    end;
+end;
+
+return result;