feat(backend): implement CRISPR-Cas API parameters and database schema

backend/app/workers/tasks.py

@@ -30,6 +30,8 @@ def run_bttoxin_analysis(
     min_coverage: float = 0.6,
     allow_unknown_families: bool = False,
     require_index_hit: bool = True,
+    crispr_fusion: bool = False,
+    crispr_weight: float = 0.0,
 ):
     """
     执行分析任务 - 完整的 4 阶段 pipeline
@@ -138,6 +140,8 @@ def run_bttoxin_analysis(
                 "min_coverage": min_coverage,
                 "allow_unknown_families": allow_unknown_families,
                 "require_index_hit": require_index_hit,
+                "crispr_fusion": crispr_fusion,
+                "crispr_weight": crispr_weight,
             }
         }