Rename the import package app to fluksio

A wheel whose top-level module is `app` collides with anything else in a
user's venv, so the package that is about to be published takes the name
it is published under. Only the Python package moves; the repo, the
Docker WORKDIR and the compose project keep theirs.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

backend/tests/scripts/test_backend_pre_start.py

@@ -2,7 +2,7 @@ from unittest.mock import MagicMock, patch
 
 from sqlmodel import select
 
-from app.backend_pre_start import init, logger
+from fluksio.backend_pre_start import init, logger
 
 
 def test_init_successful_connection() -> None:
@@ -14,8 +14,8 @@ def test_init_successful_connection() -> None:
     select1 = select(1)
 
     with (
-        patch("app.backend_pre_start.Session", return_value=session_mock),
-        patch("app.backend_pre_start.select", return_value=select1),
+        patch("fluksio.backend_pre_start.Session", return_value=session_mock),
+        patch("fluksio.backend_pre_start.select", return_value=select1),
         patch.object(logger, "info"),
         patch.object(logger, "error"),
         patch.object(logger, "warn"),

backend/tests/scripts/test_test_pre_start.py

@@ -2,7 +2,7 @@ from unittest.mock import MagicMock, patch
 
 from sqlmodel import select
 
-from app.tests_pre_start import init, logger
+from fluksio.tests_pre_start import init, logger
 
 
 def test_init_successful_connection() -> None:
@@ -14,8 +14,8 @@ def test_init_successful_connection() -> None:
     select1 = select(1)
 
     with (
-        patch("app.tests_pre_start.Session", return_value=session_mock),
-        patch("app.tests_pre_start.select", return_value=select1),
+        patch("fluksio.tests_pre_start.Session", return_value=session_mock),
+        patch("fluksio.tests_pre_start.select", return_value=select1),
         patch.object(logger, "info"),
         patch.object(logger, "error"),
         patch.object(logger, "warn"),