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/app/models/test.py

@@ -1,7 +1,7 @@
 import uuid
 from datetime import datetime
 
-from sqlalchemy import Column, String, Text, DateTime, ForeignKey, Enum
+from sqlalchemy import Column, String, Text, Boolean, DateTime, ForeignKey, Enum
 from sqlalchemy.dialects.postgresql import UUID
 from sqlalchemy.orm import relationship
 
@@ -12,12 +12,14 @@ from app.models.enums import TestState, TestResult
 class Test(Base):
     """
     Test model representing a security test for a MITRE ATT&CK technique.
-    
+
     Each test documents an attempt to validate coverage of a specific technique,
-    including the procedure, tools used, and outcome.
+    including the procedure, tools used, and outcome.  V2 introduces dual
+    validation: Red Lead and Blue Lead must each approve independently.
     """
     __tablename__ = "tests"
 
+    # ── Core fields ─────────────────────────────────────────────────
     id = Column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
     technique_id = Column(UUID(as_uuid=True), ForeignKey("techniques.id"), nullable=False)
     name = Column(String, nullable=False)
@@ -29,12 +31,27 @@ class Test(Base):
     created_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
     result = Column(Enum(TestResult, name="testresult"), nullable=True)
     state = Column(Enum(TestState, name="teststate"), default=TestState.draft)
-    validated_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
-    validated_at = Column(DateTime, nullable=True)
     created_at = Column(DateTime, default=datetime.utcnow)
 
-    # Relationships
+    # ── Red Team fields ─────────────────────────────────────────────
+    red_summary = Column(Text, nullable=True)
+    attack_success = Column(Boolean, nullable=True)
+    red_validated_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    red_validated_at = Column(DateTime, nullable=True)
+    red_validation_status = Column(String, nullable=True)   # pending / approved / rejected
+    red_validation_notes = Column(Text, nullable=True)
+
+    # ── Blue Team fields ────────────────────────────────────────────
+    blue_summary = Column(Text, nullable=True)
+    detection_result = Column(Enum(TestResult, name="testresult"), nullable=True)
+    blue_validated_by = Column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=True)
+    blue_validated_at = Column(DateTime, nullable=True)
+    blue_validation_status = Column(String, nullable=True)  # pending / approved / rejected
+    blue_validation_notes = Column(Text, nullable=True)
+
+    # ── Relationships ───────────────────────────────────────────────
     technique = relationship("Technique", back_populates="tests")
     evidences = relationship("Evidence", back_populates="test")
     creator = relationship("User", foreign_keys=[created_by])
-    validator = relationship("User", foreign_keys=[validated_by])
+    red_validator = relationship("User", foreign_keys=[red_validated_by])
+    blue_validator = relationship("User", foreign_keys=[blue_validated_by])