Import the wilm agent store, WINC adoption work and batches CLI, with four fixes

plugins/endpoints/migrations/versions/0011_endpoint_trayversion.py

@@ -0,0 +1,49 @@
+"""Cache the interactive tray app version on the endpoint state.
+
+Adds endpointstates.trayversion: the file version of the ShopDB endpoint tray
+app, reported by the agent alongside its own agentversion. The tray and the
+agent service ship and update independently (they are separate exes and can be
+pushed apart), so the tray version is stored as its own field rather than
+assumed equal to the agent (AGENT-CONTRACT.md 2).
+
+Nullable so an endpoint with no tray installed, or an older agent that predates
+the field, reads as "unknown" rather than an empty string.
+
+Idempotent: the column-add checks the live schema first, so a db.create_all()
+site (which built the column from the model already) and a re-run both stay
+clean on strict MySQL 8.
+"""
+from alembic import op
+
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'endpoints0011trayversion'
+down_revision = 'endpoints0010renamepolicy'
+branch_labels = None
+depends_on = None
+
+
+def _has_column(table_name, column_name):
+    from sqlalchemy import inspect
+
+    inspector = inspect(op.get_bind())
+    if not inspector.has_table(table_name):
+        return False
+    return any(col['name'] == column_name
+               for col in inspector.get_columns(table_name))
+
+
+def upgrade():
+    if _has_column('endpointstates', 'trayversion'):
+        return
+    op.add_column(
+        'endpointstates',
+        sa.Column('trayversion', sa.String(length=40), nullable=True))
+
+
+def downgrade():
+    if not _has_column('endpointstates', 'trayversion'):
+        return
+    op.drop_column('endpointstates', 'trayversion')