refactor: extract shared constants to common/constants.py

Move ORG_ID, GRADE_MAP, STATUS_RELATION from individual files
to common/constants.py. Domain-specific constants (_MUTABLE,
_RESERVED, _MAX_RETRIES) stay in their files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ImTotem

src/bcsd_api/common/constants.py

@@ -0,0 +1,5 @@
+ORG_ID = "bcsdlab"
+
+GRADE_MAP = {"1학년": 1, "2학년": 2, "3학년": 3, "4학년": 4, "대학원": 5}
+
+STATUS_RELATION = {"Beginner": "beginner", "Regular": "regular"}

src/bcsd_api/domain/apply/service.py

@@ -1,21 +1,20 @@
 from collections.abc import Sequence
 from datetime import datetime
 
-from bcsd_api.global_.exception import BadRequest, Conflict, Forbidden, NotFound
-from bcsd_api.domain.form.repository import PgFormRepository, PgQuestionRepository
 from bcsd_api.common.id_gen import generate_id
+from bcsd_api.common.timezone import KST
+from bcsd_api.domain.form.repository import PgFormRepository, PgQuestionRepository
 from bcsd_api.domain.member.repository import PgMemberRepository
 from bcsd_api.domain.setting.repository import PgSettingRepository
-from bcsd_api.common.timezone import KST
-
-from .repository import PgAnswerRepository, PgApplicationRepository
+from bcsd_api.global_.exception import BadRequest, Conflict, Forbidden, NotFound
 from .model import (
     AnswerRequest,
     AnswerResponse,
     ApplicationListResponse,
     MyApplicationResponse,
     PaymentInfoResponse,
 )
+from .repository import PgAnswerRepository, PgApplicationRepository
 
 
 def _now() -> str:
@@ -191,16 +190,15 @@ def approve(
     return approved
 
 
-_STATUS_RELATION = {"Beginner": "beginner", "Regular": "regular"}
-
-
 def _add_org_relation(authz, member_id: str, status: str) -> None:
     if not authz:
         return
-    relation = _STATUS_RELATION.get(status)
+    from bcsd_api.common.constants import ORG_ID, STATUS_RELATION
+
+    relation = STATUS_RELATION.get(status)
     if not relation:
         return
-    authz.add_relation("organization", "bcsdlab", relation, member_id)
+    authz.add_relation("organization", ORG_ID, relation, member_id)
 
 
 def cancel(

src/bcsd_api/global_/auth/service.py

@@ -3,13 +3,12 @@
 from sqlalchemy import Connection, select
 
 from bcsd_api.common.config import Settings
-from bcsd_api.infra.email.sender import EmailSender
-from bcsd_api.global_.exception import Conflict, Unauthorized
 from bcsd_api.common.id_gen import generate_id
-from bcsd_api.domain.member.repository import PgMemberRepository
 from bcsd_api.common.tables import app_settings
 from bcsd_api.common.timezone import KST
-
+from bcsd_api.domain.member.repository import PgMemberRepository
+from bcsd_api.global_.exception import Conflict, Unauthorized
+from bcsd_api.infra.email.sender import EmailSender
 from . import google as google_auth
 from . import token as jwt_token
 from . import verify
@@ -111,12 +110,11 @@ def _build_row(
     }
 
 
-_GRADE_MAP = {"1학년": 1, "2학년": 2, "3학년": 3, "4학년": 4, "대학원": 5}
-
-
 def _resolve_routing(grade: str, conn: Connection) -> str:
+    from bcsd_api.common.constants import GRADE_MAP
+
     threshold = _grade_threshold(conn)
-    level = _GRADE_MAP.get(grade, 1)
+    level = GRADE_MAP.get(grade, 1)
     if level >= threshold:
         return "conversion"
     return "beginner"

src/bcsd_api/global_/authz/check.py

@@ -1,11 +1,10 @@
 import logging
 
+from bcsd_api.common.constants import ORG_ID
 from bcsd_api.global_.exception import Forbidden
 
 logger = logging.getLogger(__name__)
 
-ORG_ID = "bcsdlab"
-
 
 def require_permission(authz, permission: str, user_id: str) -> None:
     if not authz: