chore(fmt): catch vendor_e2e files missed by Phase 1 sweep filter

Follow-up to commit 7cb453a. The Phase 1 sweep ran:

    gofmt -w $(gofmt -l . | grep -v vendor)

The 'grep -v vendor' filter was meant to exclude the vendor/
directory but also matched filenames containing 'vendor' as a
substring — namely:
  deploy/test/vendor_e2e_helpers.go
  deploy/test/vendor_e2e_phase3_to_13_test.go

Both files had gofmt-pending struct-field alignment that the sweep
should have caught. CI run 25192862937 (Go Build & Test) surfaced
them at the new gofmt-drift step.

Fix: re-run the sweep with an anchored filter (grep -v '^vendor/')
that only excludes the vendor directory at repo root, not any
filename containing 'vendor'.

Same gofmt-standard reformat as 7cb453a: struct-tag column
realignment and minor whitespace adjustments. No semantic changes.
Verified via 'git diff --ignore-all-space --shortstat'.

deploy/test/vendor_e2e_phase3_to_13_test.go

@@ -15,6 +15,7 @@
 // environments without `docker compose --profile deploy-e2e up -d`).
 //
 // Per frozen decision 0.6: discoverable via
+//
 //	go test -tags integration -run 'VendorEdge_<vendor>'
 package integration