refactor: Huggingface Spaces対応のため環境変数名からアンダースコアを除去

Huggingface SpacesのSecret名は `/^[a-zA-Z][a-zA-Z0-9]*$/` に従う必要があり、
アンダースコア（`_`）が使えないため、環境変数名を修正した。

変更内容:
- API_SECRET_KEY → APISECRETKEY
- HF_EMBEDDINGS_REPO_ID → HFEMBEDDINGSREPOID
- HF_TOKEN → HFTOKEN

修正ファイル:
- app/main.py: API認証キーの環境変数参照を修正
- scripts/0_download_data.py: HuggingFace Hub接続用の環境変数参照を修正

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/main.py

@@ -32,7 +32,7 @@ load_dotenv()
 
 # --- Auth ---
 API_KEY_NAME = "X-API-KEY"
-API_SECRET_KEY = os.getenv("API_SECRET_KEY")
+APISECRETKEY = os.getenv("APISECRETKEY")
 api_key_header = APIKeyHeader(name=API_KEY_NAME, auto_error=True)
 
 POSTHOG_PROJECT_API_KEY = os.getenv("POSTHOG_PROJECT_API_KEY")
@@ -40,7 +40,7 @@ POSTHOG_PROJECT_API_KEY = os.getenv("POSTHOG_PROJECT_API_KEY")
 
 async def get_api_key(key: str = Security(api_key_header)):
     """APIキーを検証する依存関係"""
-    if not API_SECRET_KEY or key != API_SECRET_KEY:
+    if not APISECRETKEY or key != APISECRETKEY:
         raise HTTPException(status_code=403, detail="Could not validate credentials.")
     return key
 

scripts/0_download_data.py

@@ -51,11 +51,11 @@ def download_embeddings() -> None:
         log.info("Embeddings binary already exists. Skipping download.")
     else:
         path = hf_hub_download(
-            repo_id=os.getenv("HF_EMBEDDINGS_REPO_ID"),
+            repo_id=os.getenv("HFEMBEDDINGSREPOID"),
             repo_type="dataset",
             filename="cc.ja.300.bin",
             local_dir=str(target_dir),
-            token=os.getenv("HF_TOKEN"),
+            token=os.getenv("HFTOKEN"),
         )
         log.info(f"Embeddings downloaded: {path}")
         _ensure_in_target_dir("cc.ja.300.bin", str(target_dir))
@@ -64,11 +64,11 @@ def download_embeddings() -> None:
         log.info("Embeddings vector already exists. Skipping download.")
     else:
         path = hf_hub_download(
-            repo_id=os.getenv("HF_EMBEDDINGS_REPO_ID"),
+            repo_id=os.getenv("HFEMBEDDINGSREPOID"),
             repo_type="dataset",
             filename="cc.ja.300.vec",
             local_dir=str(target_dir),
-            token=os.getenv("HF_TOKEN"),
+            token=os.getenv("HFTOKEN"),
         )
         log.info(f"Embeddings downloaded: {path}")
         _ensure_in_target_dir("cc.ja.300.vec", str(target_dir))