fix(ci): update nix vendor hash and stabilize txm reaping/tidy checks

- update relayer/cmd/chainlink-tron vendorHash to current go-modules hash
- make TestTxmTransactionReaping deterministic by slowing confirm polling
- remove stale blank line in go.md so modgraph/check-tidy is clean

Author: gheorghestrimtu

go.md

@@ -58,7 +58,6 @@ flowchart LR
 	classDef outline stroke-dasharray:6,fill:none;
 	class chainlink-common-repo,chainlink-protos-repo outline
 ```
-
 ## All modules
 ```mermaid
 flowchart LR

relayer/cmd/chainlink-tron/default.nix

@@ -18,7 +18,7 @@ in
     ];
 
     # pin the vendor hash (update using 'pkgs.lib.fakeHash')
-    vendorHash = "sha256-DgTypXNwCZR9e2yMVqh+FSouhf/cDtAUDVp8ttqZgMA=";
+    vendorHash = "sha256-GPxEWuqrz3Gay4aVu63DyjHedlz30mKB8vUjW/5oz7U=";
 
     # postInstall script to write version and rev to share folder
     postInstall = ''

relayer/txm/txm_test.go

@@ -384,7 +384,8 @@ func TestTxmTransactionReaping(t *testing.T) {
 
 		reapConfig := &trontxm.TronTxmConfig{
 			BroadcastChanSize: 100,
-			ConfirmPollSecs:   1,
+			// Keep confirm loop idle so this test only validates reaping behavior.
+			ConfirmPollSecs:   60,
 			RetentionPeriod:   500 * time.Millisecond,
 			ReapInterval:      50 * time.Millisecond,
 		}