feat(phase-21): add V3 demo seed, DataSource and DetectionRule models (T-200, T-201, T-202)

backend/alembic/versions/b008_add_data_sources_table.py

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+"""add_data_sources_table
+
+Revision ID: b008datasources
+Revises: b007remediation
+Create Date: 2026-02-09 14:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'b008datasources'
+down_revision: Union[str, Sequence[str], None] = 'b007remediation'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Create data_sources table."""
+    op.create_table(
+        'data_sources',
+        sa.Column('id', UUID(as_uuid=True), primary_key=True),
+        sa.Column('name', sa.String(), unique=True, nullable=False),
+        sa.Column('display_name', sa.String(), nullable=False),
+        sa.Column('type', sa.String(), nullable=False),
+        sa.Column('url', sa.String(), nullable=True),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('is_enabled', sa.Boolean(), server_default='true'),
+        sa.Column('last_sync_at', sa.DateTime(), nullable=True),
+        sa.Column('last_sync_status', sa.String(), nullable=True),
+        sa.Column('last_sync_stats', JSONB(), nullable=True),
+        sa.Column('sync_frequency', sa.String(), nullable=True),
+        sa.Column('config', JSONB(), nullable=True),
+        sa.Column('created_at', sa.DateTime(), server_default=sa.func.now()),
+    )
+    op.create_index('ix_data_sources_type', 'data_sources', ['type'])
+    op.create_index('ix_data_sources_is_enabled', 'data_sources', ['is_enabled'])
+
+
+def downgrade() -> None:
+    """Drop data_sources table."""
+    op.drop_index('ix_data_sources_is_enabled', table_name='data_sources')
+    op.drop_index('ix_data_sources_type', table_name='data_sources')
+    op.drop_table('data_sources')

backend/alembic/versions/b009_add_detection_rules_table.py

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+"""add_detection_rules_table
+
+Revision ID: b009detectionrules
+Revises: b008datasources
+Create Date: 2026-02-09 14:10:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects.postgresql import UUID, JSONB
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'b009detectionrules'
+down_revision: Union[str, Sequence[str], None] = 'b008datasources'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Create detection_rules table."""
+    op.create_table(
+        'detection_rules',
+        sa.Column('id', UUID(as_uuid=True), primary_key=True),
+        sa.Column('mitre_technique_id', sa.String(), nullable=False),
+        sa.Column('title', sa.String(), nullable=False),
+        sa.Column('description', sa.Text(), nullable=True),
+        sa.Column('source', sa.String(), nullable=False),
+        sa.Column('source_id', sa.String(), nullable=True),
+        sa.Column('source_url', sa.String(), nullable=True),
+        sa.Column('rule_content', sa.Text(), nullable=False),
+        sa.Column('rule_format', sa.String(), nullable=False),
+        sa.Column('severity', sa.String(), nullable=True),
+        sa.Column('platforms', JSONB(), nullable=True),
+        sa.Column('log_sources', JSONB(), nullable=True),
+        sa.Column('false_positive_rate', sa.String(), nullable=True),
+        sa.Column('is_active', sa.Boolean(), server_default='true'),
+        sa.Column('created_at', sa.DateTime(), server_default=sa.func.now()),
+    )
+    op.create_index('ix_detection_rules_mitre_technique_id', 'detection_rules', ['mitre_technique_id'])
+    op.create_index('ix_detection_rules_source', 'detection_rules', ['source'])
+    op.create_index('ix_detection_rules_severity', 'detection_rules', ['severity'])
+
+
+def downgrade() -> None:
+    """Drop detection_rules table."""
+    op.drop_index('ix_detection_rules_severity', table_name='detection_rules')
+    op.drop_index('ix_detection_rules_source', table_name='detection_rules')
+    op.drop_index('ix_detection_rules_mitre_technique_id', table_name='detection_rules')
+    op.drop_table('detection_rules')