Refa: treat MinerU as an OCR model (#11849)

### What problem does this PR solve?

 Treat MinerU as an OCR model.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)
- [x] Refactoring

api/apps/llm_app.py

@@ -25,7 +25,7 @@ from api.utils.api_utils import get_allowed_llm_factories, get_data_error_result
 from common.constants import StatusEnum, LLMType
 from api.db.db_models import TenantLLM
 from rag.utils.base64_image import test_image
-from rag.llm import EmbeddingModel, ChatModel, RerankModel, CvModel, TTSModel
+from rag.llm import EmbeddingModel, ChatModel, RerankModel, CvModel, TTSModel, OcrModel
 
 
 @manager.route("/factories", methods=["GET"])  # noqa: F821
@@ -43,7 +43,13 @@ def factories():
                 mdl_types[m.fid] = set([])
             mdl_types[m.fid].add(m.model_type)
         for f in fac:
-            f["model_types"] = list(mdl_types.get(f["name"], [LLMType.CHAT, LLMType.EMBEDDING, LLMType.RERANK, LLMType.IMAGE2TEXT, LLMType.SPEECH2TEXT, LLMType.TTS]))
+            f["model_types"] = list(
+                mdl_types.get(
+                    f["name"],
+                    [LLMType.CHAT, LLMType.EMBEDDING, LLMType.RERANK, LLMType.IMAGE2TEXT, LLMType.SPEECH2TEXT, LLMType.TTS, LLMType.OCR],
+                )
+            )
+
         return get_json_result(data=fac)
     except Exception as e:
         return server_error_response(e)
@@ -251,6 +257,15 @@ async def add_llm():
                 pass
         except RuntimeError as e:
             msg += f"\nFail to access model({factory}/{mdl_nm})." + str(e)
+    elif llm["model_type"] == LLMType.OCR.value:
+        assert factory in OcrModel, f"OCR model from {factory} is not supported yet."
+        try:
+            mdl = OcrModel[factory](key=llm["api_key"], model_name=mdl_nm, base_url=llm.get("api_base", ""))
+            ok, reason = mdl.check_available()
+            if not ok:
+                raise RuntimeError(reason or "Model not available")
+        except Exception as e:
+            msg += f"\nFail to access model({factory}/{mdl_nm})." + str(e)
     else:
         # TODO: check other type of models
         pass
@@ -297,6 +312,7 @@ async def delete_factory():
 @login_required
 def my_llms():
     try:
+        TenantLLMService.ensure_mineru_from_env(current_user.id)
         include_details = request.args.get("include_details", "false").lower() == "true"
 
         if include_details:
@@ -344,6 +360,7 @@ def list_app():
     weighted = []
     model_type = request.args.get("model_type")
     try:
+        TenantLLMService.ensure_mineru_from_env(current_user.id)
         objs = TenantLLMService.query(tenant_id=current_user.id)
         facts = set([o.to_dict()["llm_factory"] for o in objs if o.api_key and o.status == StatusEnum.VALID.value])
         status = {(o.llm_name + "@" + o.llm_factory) for o in objs if o.status == StatusEnum.VALID.value}