feat(05-04): implement attach File, Thumb, blob bucket, system_files migration

- Winter-exact thumb filename and 3x3 partition with lazy imaging resize
- gocloud.dev/blob fileblob/memblob; empty bucket_url fails boot
- lagoon.Migrate runs system_files before every plugin set

lagoon/migrations.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 	"unicode"
 
+	"git.golem15.com/golem15/summercms/lagoon/attach"
 	"git.golem15.com/golem15/summercms/pact"
 	"git.golem15.com/golem15/summercms/party"
 	"github.com/go-gormigrate/gormigrate/v2"
@@ -56,11 +57,19 @@ func migrator(gdb *gorm.DB, pluginID string, migrations []*gormigrate.Migration)
 	}, migrations), nil
 }
 
-// Migrate runs each plugin's HasMigrations set in party.Activate order.
+// Migrate runs the framework-owned system_files set first, then each
+// plugin's HasMigrations set in party.Activate order.
 func Migrate(gdb *gorm.DB, plugins []party.Plugin) error {
 	if gdb == nil {
 		return fmt.Errorf("lagoon: gorm db is nil")
 	}
+	m, err := migrator(gdb, "summercms.attach", attach.Migrations)
+	if err != nil {
+		return err
+	}
+	if err := m.Migrate(); err != nil {
+		return fmt.Errorf("lagoon: migrate system_files: %w", err)
+	}
 	for _, p := range plugins {
 		hm, ok := p.(pact.HasMigrations)
 		if !ok {