Fix engine daemon exit and UI DuckDB access

- Add if __name__ == '__main__' guard to main.py (engine exited immediately)
- Update Dockerfile TA-Lib build for ARM64 (config.guess/config.sub)
- Add redis dependency to pyproject.toml
- Add docker-compose.override.yml for local dev with source mounting
- Remove :ro from UI engine volume mount (DuckDB needs write for WAL)

Dockerfile

@@ -11,12 +11,15 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     build-essential \
     wget \
     curl \
+    dpkg-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Install TA-Lib C library
+# Install TA-Lib C library (with ARM64 support)
 RUN wget -q http://prdownloads.sourceforge.net/ta-lib/ta-lib-0.4.0-src.tar.gz \
     && tar -xzf ta-lib-0.4.0-src.tar.gz \
     && cd ta-lib \
+    && wget -q -O config.guess 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD' \
+    && wget -q -O config.sub 'https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD' \
     && ./configure --prefix=/usr \
     && make \
     && make install \

docker-compose.override.yml

@@ -0,0 +1,31 @@
+# Local development override - mounts source code for hot reload
+x-engine-image: &engine-image
+  image: tf-engine:local
+
+x-ui-image: &ui-image
+  image: tf-ui:local
+
+services:
+  engine:
+    <<: *engine-image
+    volumes:
+      - /Users/bnair/Documents/Crypto/engine:/data/engine
+      - /Users/bnair/Documents/Crypto/shared:/data/shared
+      - /Users/bnair/Documents/TradeFinder/src:/app/src:ro
+    user: root
+
+  ui:
+    <<: *ui-image
+    volumes:
+      - /Users/bnair/Documents/Crypto/engine:/data/engine  # DuckDB needs write access for WAL
+      - /Users/bnair/Documents/Crypto/shared:/data/shared
+      - /Users/bnair/Documents/TradeFinder/src:/app/src:ro
+    user: root
+
+  optimizer:
+    <<: *engine-image
+    user: root
+
+  backtester:
+    <<: *engine-image
+    user: root

pyproject.toml

@@ -58,6 +58,9 @@ dependencies = [
     "structlog>=24.1.0",
     "rich>=13.7.0",
     
+    # Redis
+    "redis>=5.0.0",
+
     # HTTP client
     "httpx>=0.26.0",
 ]

src/tradefinder/core/main.py

@@ -396,21 +396,18 @@ async def _determine_equity(settings: Settings, adapter: BinanceUSDMAdapter | No
 
 def _register_signal_handlers(shutdown_event: asyncio.Event) -> None:
     """Register signal handlers that trigger a graceful shutdown."""
-
     loop = asyncio.get_running_loop()
 
     def _handle(sig: signal.Signals) -> None:
         logger.info("Shutdown signal received", signal=sig.name)
         shutdown_event.set()
 
-    def _handle_signal(signum: int, frame: object) -> None:
-        shutdown_event.set()
-
     for sig in (signal.SIGINT, signal.SIGTERM):
         try:
             loop.add_signal_handler(sig, partial(_handle, sig))
-        except (NotImplementedError, RuntimeError):
+            logger.debug("Registered async signal handler", signal=sig.name)
-            signal.signal(sig, _handle_signal)
+        except (NotImplementedError, RuntimeError, OSError) as e:
+            logger.debug("Could not register async signal handler", signal=sig.name, error=str(e))
 
 
 async def _sleep_or_cancel(delay: float, shutdown_event: asyncio.Event) -> None:
@@ -431,3 +428,7 @@ async def _initialize_adapter(adapter: BinanceUSDMAdapter, symbols: list[str]) -
     await adapter.configure_hedge_mode(True)
     for symbol in symbols:
         await adapter.configure_margin_type(symbol, MarginType.ISOLATED)
+
+
+if __name__ == "__main__":
+    main()