refactor(alembic): the migration environment ships inside the package - a pip install could never migrate from repo-root alembic/

alembic.ini

@@ -1,5 +1,5 @@
 [alembic]
-script_location = %(here)s/alembic
+script_location = %(here)s/src/treg/alembic
 prepend_sys_path = .
 path_separator = os
 sqlalchemy.url =

alembic/README

@@ -1,3 +0,0 @@
-Alembic migrations for the tools-registry server schema.
-
-The application continues to run treg.db.init_db at startup until refactor stage 5.

src/treg/alembic/README

@@ -0,0 +1,4 @@
+Alembic migrations for the tools-registry server schema.
+
+This directory ships inside the wheel. treg.maintenance runs Alembic before release tasks.
+The frozen treg.db.init_db path remains for legacy adoption and temporary lifespan/worker redundancy.

src/treg/alembic/__init__.py

@@ -0,0 +1 @@
+"""Alembic migration environment shipped inside the server package."""