feat: direct docker-compose import into projects

POST /projects/:id/import-compose deploys a compose file straight into a
project — no template row required. Well-known DB images become managed
databases attached to the project network under their service name as DNS
alias; other services deploy in dependency order via deployTemplateGraph.

- api: extract composeToSpecs converter (shared by the template
  import-compose preview and the new project endpoint); fix dropped env
  warnings (pointer receiver); replace insertion sort with sort.Strings
- cascade: database_services.project_id links graph-provisioned DBs to
  their project so project delete tears down runtime + row (previously
  leaked container + network)
- cli: new `containr import` group, `import compose <project> <file|->`
- mcp: containr_projects_import_compose tool
- openapi + regenerated frontend types; docs snapshot + CLI.md
- frontend: compose import modal on the project workspace toolbar
- tests: composeToSpecs conversion, ordering, db-image map, warnings

app/backend/internal/database/sqlcdb/querier.go

@@ -34,6 +34,7 @@ type Querier interface {
 	DatabaseServiceExistsByIDAndUser(ctx context.Context, arg DatabaseServiceExistsByIDAndUserParams) (bool, error)
 	DeleteAgent(ctx context.Context, id string) error
 	DeleteBackupTargetByIDAndUser(ctx context.Context, arg DeleteBackupTargetByIDAndUserParams) error
+	DeleteDatabaseServiceByID(ctx context.Context, id string) error
 	DeleteDatabaseServiceByIDAndUser(ctx context.Context, arg DeleteDatabaseServiceByIDAndUserParams) error
 	DeleteProjectByID(ctx context.Context, projectID uuid.UUID) (int64, error)
 	DeleteUserTemplate(ctx context.Context, arg DeleteUserTemplateParams) (int64, error)
@@ -65,6 +66,7 @@ type Querier interface {
 	ListCommandsForAgent(ctx context.Context, nodeAgentID string) ([]AgentCommand, error)
 	ListContainersForAgent(ctx context.Context, nodeAgentID string) ([]ContainerInstance, error)
 	ListDatabaseBackupsByDatabaseAndUser(ctx context.Context, arg ListDatabaseBackupsByDatabaseAndUserParams) ([]DatabaseBackup, error)
+	ListDatabaseServicesByProject(ctx context.Context, projectID uuid.NullUUID) ([]DatabaseService, error)
 	ListDatabaseServicesByUser(ctx context.Context, userID string) ([]DatabaseService, error)
 	ListDueDatabaseBackups(ctx context.Context) ([]ListDueDatabaseBackupsRow, error)
 	ListNotificationsByUser(ctx context.Context, arg ListNotificationsByUserParams) ([]Notification, error)