feat(file-summary): 实现文件处理技能链路

review_agent/file_summary/skills/file_inventory.py

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+from __future__ import annotations
+
+from pathlib import Path
+
+from review_agent.models import FileSummaryBatchAttachment
+
+from ..paths import resolve_storage_path
+from ..services.inventory import scan_files_to_items
+from .base import BaseSkill, SkillResult, WorkflowContext
+
+
+class FileInventorySkill(BaseSkill):
+    name = "file_inventory"
+
+    def run(self, context: WorkflowContext) -> SkillResult:
+        roots = [
+            resolve_storage_path(binding.attachment.storage_path)
+            for binding in FileSummaryBatchAttachment.objects.filter(batch=context.batch)
+        ]
+        items = scan_files_to_items(batch=context.batch, roots=roots)
+        return SkillResult(success=True, data={"total_files": len(items)})