feat(tests): auto-propose procedure suggestions from submitted rounds, add lead review workflow

When Red or Blue submits a round for a test created from a template,
any extractable command in their procedure text is proposed as an
update to the template's suggested procedure — never written
automatically. Adds GET/approve/reject endpoints scoped so a lead only
reviews their own team's suggestions; approving writes the suggested
text into the template, rejecting leaves it untouched.

backend/app/main.py

@@ -43,6 +43,7 @@ from app.routers import techniques as techniques_router
 from app.routers import tests as tests_router
 from app.routers import evidence as evidence_router
 from app.routers import test_templates as test_templates_router
+from app.routers import procedure_suggestions as procedure_suggestions_router
 from app.routers import system as system_router
 from app.routers import metrics as metrics_router
 from app.routers import users as users_router
@@ -213,6 +214,7 @@ app.include_router(tests_router.router, prefix="/api/v1")
 app.include_router(evidence_router.router, prefix="/api/v1")
 # Call app.include_router()
 app.include_router(test_templates_router.router, prefix="/api/v1")
+app.include_router(procedure_suggestions_router.router, prefix="/api/v1")
 # Call app.include_router()
 app.include_router(system_router.router, prefix="/api/v1")
 # Call app.include_router()