Implement FastAPI Temporal MVP pipeline

app/config/settings.py

@@ -0,0 +1,37 @@
+"""Application settings."""
+
+from functools import lru_cache
+
+from pydantic_settings import BaseSettings, SettingsConfigDict
+
+
+class Settings(BaseSettings):
+    """Runtime settings loaded from environment variables."""
+
+    app_name: str = "temporal-image-pipeline"
+    api_prefix: str = "/api/v1"
+    debug: bool = False
+    auto_create_tables: bool = True
+    database_url: str = "sqlite+aiosqlite:///./temporal_demo.db"
+    temporal_address: str = "localhost:7233"
+    temporal_namespace: str = "default"
+
+    model_config = SettingsConfigDict(
+        env_file=".env",
+        env_file_encoding="utf-8",
+        case_sensitive=False,
+    )
+
+    @property
+    def sync_database_url(self) -> str:
+        """Return a synchronous SQLAlchemy URL for migrations."""
+
+        return self.database_url.replace("+aiosqlite", "")
+
+
+@lru_cache(maxsize=1)
+def get_settings() -> Settings:
+    """Return the cached application settings."""
+
+    return Settings()
+