feat: add queue status endpoint for upload page

GET /api/v2/system/queue/status returns counts of documents
by processing_status (waiting/processing) from leaudit_documents,
plus processing document IDs for the frontend progress display.

fastapi_modules/fastapi_leaudit/controllers/documentController.py

@@ -3,7 +3,10 @@
 from typing import Any
 
 from fastapi import File, Form, Query, UploadFile
+from pydantic import BaseModel, Field
+from sqlalchemy import text
 
+from fastapi_common.fastapi_common_sqlalchemy.database import GetAsyncSession
 from fastapi_common.fastapi_common_web.controller import BaseController
 from fastapi_common.fastapi_common_web.domain.responses import Result
 
@@ -12,6 +15,13 @@ from fastapi_modules.fastapi_leaudit.services import IDocumentService
 from fastapi_modules.fastapi_leaudit.services.impl.documentServiceImpl import DocumentServiceImpl
 
 
+class QueueStatusVO(BaseModel):
+    success: bool = Field(True)
+    timestamp: str = Field("")
+    queue: dict[str, int] = Field(default_factory=lambda: {"pending_tasks": 0, "processing_tasks": 0, "available_slots": 4, "max_concurrent": 4})
+    documents: dict[str, object] = Field(default_factory=lambda: {"waiting": 0, "processing": 0, "processing_ids": []})
+
+
 class DocumentController(BaseController):
     """文档控制器。"""
 
@@ -84,3 +94,69 @@ class DocumentController(BaseController):
                 idList = [int(x.strip()) for x in ids.split(",") if x.strip().isdigit()]
             Data = await self.DocumentService.ListDocumentTypes(Ids=idList)
             return Result.success(data=Data)
+
+        @self.router.get("/v2/system/queue/status", response_model=Result[QueueStatusVO])
+        async def GetQueueStatus():
+            """获取文档处理队列状态。"""
+            from datetime import datetime
+
+            async with GetAsyncSession() as Session:
+                statusRows = (
+                    await Session.execute(
+                        text(
+                            """
+                            SELECT processing_status, COUNT(*) AS cnt
+                            FROM leaudit_documents
+                            WHERE deleted_at IS NULL AND is_latest_version = true
+                            GROUP BY processing_status
+                            """
+                        )
+                    )
+                ).mappings().all()
+
+            waiting = 0
+            processing = 0
+            for row in statusRows:
+                s = str(row["processing_status"] or "")
+                c = int(row["cnt"] or 0)
+                if s == "waiting":
+                    waiting = c
+                elif s in ("processing", "running"):
+                    processing += c
+
+            processingIdsRows: list[int] = []
+            if processing > 0:
+                async with GetAsyncSession() as Session:
+                    idRows = (
+                        await Session.execute(
+                            text(
+                                """
+                                SELECT id FROM leaudit_documents
+                                WHERE deleted_at IS NULL
+                                  AND is_latest_version = true
+                                  AND processing_status IN ('processing', 'running')
+                                ORDER BY updated_at DESC
+                                LIMIT 50
+                                """
+                            )
+                        )
+                    ).fetchall()
+                    processingIdsRows = [int(r[0]) for r in idRows]
+
+            return Result.success(
+                data=QueueStatusVO(
+                    success=True,
+                    timestamp=datetime.now().isoformat(),
+                    queue={
+                        "pending_tasks": waiting,
+                        "processing_tasks": processing,
+                        "available_slots": max(0, 4 - processing),
+                        "max_concurrent": 4,
+                    },
+                    documents={
+                        "waiting": waiting,
+                        "processing": processing,
+                        "processing_ids": processingIdsRows,
+                    },
+                )
+            )