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/fluksio/alembic/versions/b7c41d2f8a30_drop_item_table.py

@@ -0,0 +1,40 @@
+"""Drop the item table
+
+The template's example model. Flows are persisted as files in their own git
+repository, so nothing in the app uses it any more.
+
+Revision ID: b7c41d2f8a30
+Revises: fe56fa70289e
+Create Date: 2026-08-15
+
+"""
+
+import sqlalchemy as sa
+import sqlmodel.sql.sqltypes
+from alembic import op
+
+revision = "b7c41d2f8a30"
+down_revision = "fe56fa70289e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_table("item")
+
+
+def downgrade():
+    op.create_table(
+        "item",
+        sa.Column("id", sa.Uuid(), nullable=False),
+        sa.Column(
+            "title", sqlmodel.sql.sqltypes.AutoString(length=255), nullable=False
+        ),
+        sa.Column(
+            "description", sqlmodel.sql.sqltypes.AutoString(length=255), nullable=True
+        ),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=True),
+        sa.Column("owner_id", sa.Uuid(), nullable=False),
+        sa.ForeignKeyConstraint(["owner_id"], ["user.id"], ondelete="CASCADE"),
+        sa.PrimaryKeyConstraint("id"),
+    )