fix(700줄분리): 진입 파일에서 분리 전 이름 전부 재노출

laptop-sub 가 쓴 AST 대조법(분리 전 커밋의 모듈 정의 이름 ↔ 지금 모듈 `dir()`)을
내 4개에도 적용해 누락 26개를 찾아 되살림.

- `B03_FileInput_Router.py` 누락 17 → 0 (헬퍼 13 + 청크 엔드포인트 4)
- `B03_FileInput_Router_Temp.py` 누락 5 → 0 (`_total_chunks` + 청크 엔드포인트 4)
- `B07_DesignDetail_Router_Support.py` 누락 3 → 0 (`_BASIN_MAX_DISTANCE_M` ·
  `_clip_segment` · `_geometry_lines`)
- `config/config_system.py` 누락 1 → 0 (`_SCS_SOIL` — `import *` 가 밑줄 이름을 안 실음)

검증: 네 파일 모두 **정의 이름 누락 0**(28·19·36·246개 대조), 라우트 수 유지
(B03 7 · temp 9+attach 1 · B07 7), ruff check 통과, tmp/tests 378 passed

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

B03_FileInput/B03_FileInput_Router_Temp.py

@@ -40,12 +40,35 @@ from B03_FileInput.B03_FileInput_Repository_Temp import (
     upsert_temp_batch_file,
 )
 from B03_FileInput.B03_FileInput_Router_Errors import lookup_error_response
+
+# 분리 전 이 파일에 있던 이름은 그대로 다시 내보낸다(2026-09-04).
+from B03_FileInput.B03_FileInput_Router_Temp_Chunks import (
+    create_batch_upload_session as create_batch_upload_session,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Chunks import (
+    finalize_batch_upload as finalize_batch_upload,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Chunks import (
+    get_batch_upload_status as get_batch_upload_status,
+)
 from B03_FileInput.B03_FileInput_Router_Temp_Chunks import router as chunk_router
+from B03_FileInput.B03_FileInput_Router_Temp_Chunks import (
+    upload_batch_chunk as upload_batch_chunk,
+)
 from B03_FileInput.B03_FileInput_Router_Temp_Support import (
-    _POINT_CLOUD_FILE_TYPES,
-    _batch_root,
-    _iso,
-    _refresh_batch_status,
+    _POINT_CLOUD_FILE_TYPES as _POINT_CLOUD_FILE_TYPES,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Support import (
+    _batch_root as _batch_root,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Support import (
+    _iso as _iso,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Support import (
+    _refresh_batch_status as _refresh_batch_status,
+)
+from B03_FileInput.B03_FileInput_Router_Temp_Support import (
+    _total_chunks as _total_chunks,
 )
 from B03_FileInput.B03_FileInput_Schema import (
     FileUploadDescriptor,