Added multi-protocol support for devices, improved models and updated readme.md and instructions

db_migrations/alembic/versions/20251101_1907_4e405f1129b1_add_protocol_and_connection_config_to_.py

@@ -0,0 +1,55 @@
+"""add protocol and connection_config to devices
+
+Revision ID: 4e405f1129b1
+Revises: 4f152b34e800
+Create Date: 2025-11-01 19:07:22.800918+00:00
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '4e405f1129b1'
+down_revision: Union[str, Sequence[str], None] = '4f152b34e800'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('device_credentials',
+    sa.Column('id', sa.Text(), nullable=False),
+    sa.Column('device_id', sa.Text(), nullable=False),
+    sa.Column('credential_type', sa.Text(), nullable=False),
+    sa.Column('credential_hash', sa.Text(), nullable=False),
+    sa.Column('created_at', sa.DateTime(timezone=True), nullable=False),
+    sa.Column('expires_at', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('revoked_at', sa.DateTime(timezone=True), nullable=True),
+    sa.ForeignKeyConstraint(['device_id'], ['devices.id'], ondelete='CASCADE'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index('idx_device_credentials_active', 'device_credentials', ['device_id', 'revoked_at'], unique=False)
+    op.create_index('idx_device_credentials_device_id', 'device_credentials', ['device_id'], unique=False)
+    
+    # Add protocol column as nullable first, set default for existing rows, then make NOT NULL
+    op.add_column('devices', sa.Column('protocol', sa.Text(), nullable=True))
+    op.execute("UPDATE devices SET protocol = 'mqtt' WHERE protocol IS NULL")
+    op.alter_column('devices', 'protocol', nullable=False)
+    
+    op.add_column('devices', sa.Column('connection_config', sa.JSON(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('devices', 'connection_config')
+    op.drop_column('devices', 'protocol')
+    op.drop_index('idx_device_credentials_device_id', table_name='device_credentials')
+    op.drop_index('idx_device_credentials_active', table_name='device_credentials')
+    op.drop_table('device_credentials')
+    # ### end Alembic commands ###