new api service and logic implemented

docs/improvements/validation_service/backend/schema_converter.py

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+# Original content from ApiEvents/ValidationServiceApi/schema_converter.py
+from typing import Dict, Any, Type, get_type_hints, get_args, get_origin
+from pydantic import BaseModel, Field, EmailStr
+from enum import Enum
+import inspect
+from fastapi import APIRouter
+from datetime import datetime
+
+# ... rest of the file content ...

docs/improvements/validation_service/backend/unified_schema_service.py

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+from typing import Dict, Any, Type, Optional
+from pydantic import BaseModel
+from fastapi import APIRouter, Header
+
+class ValidationMessages(BaseModel):
+    """Messages for Zod validation"""
+    required: str
+    invalid_type: str
+    invalid_string: Dict[str, str]  # email, url, etc
+    too_small: Dict[str, str]       # string, array, number
+    too_big: Dict[str, str]         # string, array, number
+    invalid_date: str
+    invalid_enum: str
+    custom: Dict[str, str]
+
+class SchemaField(BaseModel):
+    """Schema field definition"""
+    type: str
+    items: Optional[str] = None  # For arrays
+    values: Optional[list] = None  # For enums
+    validations: Optional[Dict[str, Any]] = None
+
+class SchemaDefinition(BaseModel):
+    """Complete schema definition"""
+    name: str
+    fields: Dict[str, SchemaField]
+    messages: ValidationMessages
+
+class UnifiedSchemaService:
+    def __init__(self):
+        self.messages = {
+            "tr": ValidationMessages(
+                required="Bu alan zorunludur",
+                invalid_type="Geçersiz tip",
+                invalid_string={
+                    "email": "Geçerli bir e-posta adresi giriniz",
+                    "url": "Geçerli bir URL giriniz",
+                    "uuid": "Geçerli bir UUID giriniz"
+                },
+                too_small={
+                    "string": "{min} karakterden az olamaz",
+                    "array": "En az {min} öğe gereklidir",
+                    "number": "En az {min} olmalıdır"
+                },
+                too_big={
+                    "string": "{max} karakterden fazla olamaz",
+                    "array": "En fazla {max} öğe olabilir",
+                    "number": "En fazla {max} olabilir"
+                },
+                invalid_date="Geçerli bir tarih giriniz",
+                invalid_enum="Geçersiz seçim",
+                custom={
+                    "password_match": "Şifreler eşleşmiyor",
+                    "strong_password": "Şifre güçlü değil"
+                }
+            ),
+            "en": ValidationMessages(
+                required="This field is required",
+                invalid_type="Invalid type",
+                invalid_string={
+                    "email": "Please enter a valid email",
+                    "url": "Please enter a valid URL",
+                    "uuid": "Please enter a valid UUID"
+                },
+                too_small={
+                    "string": "Must be at least {min} characters",
+                    "array": "Must contain at least {min} items",
+                    "number": "Must be at least {min}"
+                },
+                too_big={
+                    "string": "Must be at most {max} characters",
+                    "array": "Must contain at most {max} items",
+                    "number": "Must be at most {max}"
+                },
+                invalid_date="Please enter a valid date",
+                invalid_enum="Invalid selection",
+                custom={
+                    "password_match": "Passwords do not match",
+                    "strong_password": "Password is not strong enough"
+                }
+            )
+        }
+
+    def get_schema_with_messages(
+        self,
+        model: Type[BaseModel],
+        lang: str = "tr"
+    ) -> SchemaDefinition:
+        """Get schema definition with validation messages"""
+        fields: Dict[str, SchemaField] = {}
+        
+        for field_name, field in model.__fields__.items():
+            field_info = SchemaField(
+                type=self._get_field_type(field.outer_type_),
+                items=self._get_items_type(field.outer_type_),
+                values=self._get_enum_values(field.outer_type_),
+                validations=self._get_validations(field)
+            )
+            fields[field_name] = field_info
+
+        return SchemaDefinition(
+            name=model.__name__,
+            fields=fields,
+            messages=self.messages[lang]
+        )
+
+    def _get_field_type(self, type_: Type) -> str:
+        # Implementation similar to SchemaConverter
+        pass
+
+    def _get_items_type(self, type_: Type) -> Optional[str]:
+        # Implementation similar to SchemaConverter
+        pass
+
+    def _get_enum_values(self, type_: Type) -> Optional[list]:
+        # Implementation similar to SchemaConverter
+        pass
+
+    def _get_validations(self, field) -> Optional[Dict[str, Any]]:
+        # Implementation similar to SchemaConverter
+        pass
+
+router = APIRouter(prefix="/api/schema", tags=["Schema"])
+schema_service = UnifiedSchemaService()
+
+@router.get("/model/{model_name}")
+async def get_model_schema(
+    model_name: str,
+    accept_language: Optional[str] = Header(default="tr")
+) -> SchemaDefinition:
+    """Get model schema with validation messages"""
+    # You'd need to implement model lookup
+    models = {
+        "User": UserModel,
+        "Product": ProductModel,
+        # Add your models here
+    }
+    
+    if model_name not in models:
+        raise ValueError(f"Model {model_name} not found")
+    
+    lang = accept_language.split(",")[0][:2]
+    return schema_service.get_schema_with_messages(
+        models[model_name],
+        lang if lang in ["tr", "en"] else "tr"
+    )