refactor: extract data fixes into dedicated package

internal/database/fixes.go

@@ -5,27 +5,16 @@ import (
 	"database/sql"
 	"fmt"
 	"log"
-	"sort"
 	"time"
+
+	dbfixes "mal/internal/database/fixes"
 )
 
-type dataFix struct {
-	id    string
-	apply func(ctx context.Context, sqlDB *sql.DB) error
-}
-
-var registeredDataFixes []dataFix
-
-func registerDataFix(fix dataFix) {
-	registeredDataFixes = append(registeredDataFixes, fix)
-}
-
 func RunDataFixes(sqlDB *sql.DB) error {
 	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
 	defer cancel()
 
-	fixes := append([]dataFix(nil), registeredDataFixes...)
-	sort.Slice(fixes, func(i, j int) bool { return fixes[i].id < fixes[j].id })
+	fixes := dbfixes.All()
 
 	if len(fixes) == 0 {
 		return nil
@@ -41,15 +30,15 @@ func RunDataFixes(sqlDB *sql.DB) error {
 	}
 
 	for _, fix := range fixes {
-		if applied[fix.id] {
+		if applied[fix.ID] {
 			continue
 		}
 
-		log.Printf("Running data fix id=%s", fix.id)
-		if err := fix.apply(ctx, sqlDB); err != nil {
-			return fmt.Errorf("data fix %s failed: %w", fix.id, err)
+		log.Printf("Running data fix id=%s", fix.ID)
+		if err := fix.Apply(ctx, sqlDB); err != nil {
+			return fmt.Errorf("data fix %s failed: %w", fix.ID, err)
 		}
-		if err := markFixApplied(ctx, sqlDB, fix.id); err != nil {
+		if err := markFixApplied(ctx, sqlDB, fix.ID); err != nil {
 			return err
 		}
 	}

internal/database/fixes/20260526_episode_availability_backfill_next_refresh_at.go

@@ -1,4 +1,4 @@
-package database
+package fixes
 
 import (
 	"context"
@@ -7,9 +7,9 @@ import (
 )
 
 func init() {
-	registerDataFix(dataFix{
-		id: "20260526_episode_availability_backfill_next_refresh_at",
-		apply: func(ctx context.Context, sqlDB *sql.DB) error {
+	Register(Fix{
+		ID: "20260526_episode_availability_backfill_next_refresh_at",
+		Apply: func(ctx context.Context, sqlDB *sql.DB) error {
 			// Old caches could have next_refresh_at NULL (especially for airing shows with missing broadcast metadata),
 			// which can result in "never refresh again" behavior on the server.
 			_, err := sqlDB.ExecContext(ctx, `
@@ -25,3 +25,4 @@ WHERE next_refresh_at IS NULL;
 		},
 	})
 }
+

internal/database/fixes/registry.go

@@ -0,0 +1,25 @@
+package fixes
+
+import (
+	"context"
+	"database/sql"
+	"sort"
+)
+
+type Fix struct {
+	ID    string
+	Apply func(ctx context.Context, sqlDB *sql.DB) error
+}
+
+var registered []Fix
+
+func Register(fix Fix) {
+	registered = append(registered, fix)
+}
+
+func All() []Fix {
+	out := append([]Fix(nil), registered...)
+	sort.Slice(out, func(i, j int) bool { return out[i].ID < out[j].ID })
+	return out
+}
+

scripts/new-data-fix.ts

@@ -32,8 +32,8 @@ async function main(): Promise<void> {
   }
 
   const id = `${formatYYYYMMDD(new Date())}_${slug}`;
-  const dir = path.join(process.cwd(), 'internal', 'database');
-  const filePath = path.join(dir, `fix_${id}.go`);
+  const dir = path.join(process.cwd(), 'internal', 'database', 'fixes');
+  const filePath = path.join(dir, `${id}.go`);
 
   await mkdir(dir, { recursive: true });
 
@@ -41,7 +41,7 @@ async function main(): Promise<void> {
     throw new Error(`data fix already exists: ${filePath}`);
   }
 
-  const contents = `package database
+  const contents = `package fixes
 
 import (
 	"context"
@@ -50,9 +50,9 @@ import (
 )
 
 func init() {
-	registerDataFix(dataFix{
-		id: "${id}",
-		apply: func(ctx context.Context, sqlDB *sql.DB) error {
+	Register(Fix{
+		ID: "${id}",
+		Apply: func(ctx context.Context, sqlDB *sql.DB) error {
 			// TODO: implement fix
 			// _, err := sqlDB.ExecContext(ctx, \`UPDATE ...\`)
 			// if err != nil { return fmt.Errorf("...: %w", err) }