feat: add pydantic schemas for location API

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/schemas/common.py

@@ -0,0 +1,7 @@
+from pydantic import BaseModel
+
+
+class ErrorResponse(BaseModel):
+    error_code: str
+    message: str
+    detail: dict | None = None

app/schemas/location.py

@@ -0,0 +1,39 @@
+import re
+
+from pydantic import BaseModel, field_validator
+
+ZONGPAI_PATTERN = re.compile(r"^(\d{2}(B|C|T)\d+|\d{2}(BW|CW)\d{4})$")
+LOCATION_NORMAL_PATTERN = re.compile(r"^[A-Z]+\d+-\d+-\d+$")
+LOCATION_TRANS_PATTERN = re.compile(r"^TRANS-\d+")
+
+
+class LocationRequest(BaseModel):
+    zongpai_no: str
+    location_code: str
+
+    @field_validator("zongpai_no")
+    @classmethod
+    def validate_zongpai_no(cls, v: str) -> str:
+        v = v.strip().upper()
+        if not ZONGPAI_PATTERN.match(v):
+            raise ValueError("INVALID_ZONGPAI")
+        return v
+
+    @field_validator("location_code")
+    @classmethod
+    def validate_location_code(cls, v: str) -> str:
+        v = v.strip().upper()
+        if not LOCATION_NORMAL_PATTERN.match(v) and not LOCATION_TRANS_PATTERN.match(v):
+            raise ValueError("INVALID_LOCATION")
+        return v
+
+
+class LocationResponse(BaseModel):
+    zongpai_no: str
+    location_code: str
+    created_at: str
+
+
+class DuplicateLocationDetail(BaseModel):
+    existing_location: str
+    created_at: str