chore(deps): tidy the module files

Plain `go mod tidy` output, no hand edits, so the files match what the tool
produces from the current import graph:

  - github.com/minio/minio-go/v7 becomes direct. internal/submit/s3store.go has
    imported it since 598f3d3, which added the S3 upload backend without tidying.
  - golang.org/x/crypto becomes indirect. Nothing imports it directly any more —
    the passwordless migration removed the last caller.
  - github.com/clipperhouse/stringish drops out of the graph entirely.
  - go.sum loses 26 stale lines.

No version changes and no behaviour change; vet and the full test suite pass
unchanged.

go.mod

@@ -13,9 +13,9 @@ require (
 	github.com/golang-jwt/jwt/v5 v5.3.1
 	github.com/google/uuid v1.6.0
 	github.com/jackc/pgx/v5 v5.7.1
+	github.com/minio/minio-go/v7 v7.2.1
 	github.com/prometheus/client_golang v1.19.1
 	github.com/prometheus/client_model v0.6.1
-	golang.org/x/crypto v0.52.0
 	k8s.io/api v0.31.3
 	k8s.io/apimachinery v0.31.3
 	k8s.io/client-go v0.31.0
@@ -35,7 +35,6 @@ require (
 	github.com/charmbracelet/x/exp/strings v0.0.0-20240722160745-212f7b056ed0 // indirect
 	github.com/charmbracelet/x/term v0.2.2 // indirect
 	github.com/clipperhouse/displaywidth v0.11.0 // indirect
-	github.com/clipperhouse/stringish v0.1.1 // indirect
 	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
@@ -72,7 +71,6 @@ require (
 	github.com/mattn/go-runewidth v0.0.23 // indirect
 	github.com/minio/crc64nvme v1.1.1 // indirect
 	github.com/minio/md5-simd v1.1.2 // indirect
-	github.com/minio/minio-go/v7 v7.2.1 // indirect
 	github.com/mitchellh/hashstructure/v2 v2.0.2 // indirect
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
@@ -92,6 +90,7 @@ require (
 	github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
 	github.com/zeebo/xxh3 v1.1.0 // indirect
 	go.yaml.in/yaml/v3 v3.0.4 // indirect
+	golang.org/x/crypto v0.52.0 // indirect
 	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
 	golang.org/x/net v0.54.0 // indirect
 	golang.org/x/oauth2 v0.21.0 // indirect