feat: NanoClaude Phase 1 — 비동기 job 기반 AI Gateway 코어 구현

POST /chat → job_id ACK, GET /chat/{job_id}/stream → SSE 스트리밍,
EXAONE Ollama adapter, JobManager, StateStream, Worker 구조

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

nanoclaude/config.py

@@ -0,0 +1,21 @@
+from pydantic_settings import BaseSettings
+
+
+class Settings(BaseSettings):
+    # EXAONE via Ollama
+    exaone_base_url: str = "http://localhost:11434"
+    exaone_model: str = "exaone:7.8b"
+    exaone_temperature: float = 0.7
+    exaone_timeout: float = 120.0
+
+    # Server
+    host: str = "0.0.0.0"
+    port: int = 8100
+
+    # Optional API key (empty = disabled)
+    api_key: str = ""
+
+    model_config = {"env_file": ".env", "extra": "ignore"}
+
+
+settings = Settings()