Keep Mongo operations online across Vault credential rotation

backend/shared/database/internal/repository/index.go

@@ -12,7 +12,14 @@ import (
 )
 
 func (r *MongoRepository) CreateIndex(def *ri.Definition) error {
-	if r.collection == nil {
+	ctx := context.Background()
+	collection, ctx, release, err := r.acquire(ctx)
+	if err != nil {
+		return err
+	}
+	defer release()
+
+	if collection == nil {
 		return merrors.NoData("data collection is not set")
 	}
 	if len(def.Keys) == 0 {
@@ -49,28 +56,40 @@ func (r *MongoRepository) CreateIndex(def *ri.Definition) error {
 		opts.SetSparse(def.Sparse)
 	}
 
-	_, err := r.collection.Indexes().CreateOne(
-		context.Background(),
+	_, err = collection.Indexes().CreateOne(
+		ctx,
 		mongo.IndexModel{Keys: keys, Options: opts},
 	)
 	return err
 }
 
 func (r *MongoRepository) DropIndex(ctx context.Context, name string) error {
-	if r.collection == nil {
+	collection, ctx, release, err := r.acquire(ctx)
+	if err != nil {
+		return err
+	}
+	defer release()
+
+	if collection == nil {
 		return merrors.NoData("data collection is not set")
 	}
 	if name == "" {
 		return merrors.InvalidArgument("index name is required", "index.name")
 	}
-	return r.collection.Indexes().DropOne(ctx, name)
+	return collection.Indexes().DropOne(ctx, name)
 }
 
 func (r *MongoRepository) ListIndexDefinitions(ctx context.Context) ([]*ri.Definition, error) {
-	if r.collection == nil {
+	collection, ctx, release, err := r.acquire(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer release()
+
+	if collection == nil {
 		return nil, merrors.NoData("data collection is not set")
 	}
-	cursor, err := r.collection.Indexes().List(ctx)
+	cursor, err := collection.Indexes().List(ctx)
 	if err != nil {
 		return nil, err
 	}