feat(phase-11): implement Red/Blue business logic services (T-106, T-107, T-108)

T-106: Create test_workflow_service.py with state-machine transitions for the complete test lifecycle (draft -> red_executing -> blue_evaluating -> in_review -> validated/rejected), dual validation by Red/Blue leads, and reopen capability with field cleanup.

T-107: Update status_service.py to use detection_result from Blue Team instead of legacy result field, and differentiate between partial progress (some validated) vs all-in-progress states.

T-108: Create atomic_import_service.py that downloads the Atomic Red Team repo as a ZIP (avoiding API rate limits), parses all atomics YAML files, and creates idempotent TestTemplate records mapped to MITRE techniques.

Includes validation tests for all three tasks (19 checks total).

backend/alembic/versions/b005_add_v2_indexes.py

@@ -0,0 +1,55 @@
+"""add_v2_indexes
+
+Revision ID: b005v2indexes
+Revises: b004templates
+Create Date: 2026-02-09 10:04:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'b005v2indexes'
+down_revision: Union[str, Sequence[str], None] = 'b004templates'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Create performance indexes for V2 queries."""
+    # ── Tests ───────────────────────────────────────────────────
+    op.create_index('ix_tests_state', 'tests', ['state'])
+    op.create_index('ix_tests_technique_id', 'tests', ['technique_id'])
+    op.create_index('ix_tests_created_by', 'tests', ['created_by'])
+    op.create_index('ix_tests_red_validation_status', 'tests', ['red_validation_status'])
+    op.create_index('ix_tests_blue_validation_status', 'tests', ['blue_validation_status'])
+
+    # ── Evidences ───────────────────────────────────────────────
+    op.create_index('ix_evidences_test_id', 'evidences', ['test_id'])
+    op.create_index('ix_evidences_team', 'evidences', ['team'])
+
+    # ── Techniques (if not already present from MVP) ────────────
+    op.create_index('ix_techniques_tactic', 'techniques', ['tactic'])
+    op.create_index('ix_techniques_status_global', 'techniques', ['status_global'])
+    op.create_index('ix_techniques_review_required', 'techniques', ['review_required'])
+
+
+def downgrade() -> None:
+    """Drop all V2 indexes."""
+    # Techniques
+    op.drop_index('ix_techniques_review_required', table_name='techniques')
+    op.drop_index('ix_techniques_status_global', table_name='techniques')
+    op.drop_index('ix_techniques_tactic', table_name='techniques')
+
+    # Evidences
+    op.drop_index('ix_evidences_team', table_name='evidences')
+    op.drop_index('ix_evidences_test_id', table_name='evidences')
+
+    # Tests
+    op.drop_index('ix_tests_blue_validation_status', table_name='tests')
+    op.drop_index('ix_tests_red_validation_status', table_name='tests')
+    op.drop_index('ix_tests_created_by', table_name='tests')
+    op.drop_index('ix_tests_technique_id', table_name='tests')
+    op.drop_index('ix_tests_state', table_name='tests')