fix: Add missing workspace members to Dockerfiles (Agent 94)

- Explicitly copy all workspace members including new load_tests, stress_tests, integration_tests
- Fixes Docker build failures with 'failed to load manifest for workspace member' errors
- All 4 services updated: api_gateway, trading_service, backtesting_service, ml_training_service
- Replaced 'COPY . .' with explicit COPY statements for better build reliability

services/backtesting_service/Dockerfile

@@ -19,8 +19,32 @@ WORKDIR /build
 # Copy workspace manifests
 COPY Cargo.toml Cargo.lock ./
 
-# Copy entire workspace (simple direct build)
-COPY . .
+# Copy workspace members to satisfy manifest dependencies
+COPY trading_engine ./trading_engine
+COPY risk ./risk
+COPY risk-data ./risk-data
+COPY trading-data ./trading-data
+COPY tli ./tli
+COPY ml ./ml
+COPY ml-data ./ml-data
+COPY data ./data
+COPY backtesting ./backtesting
+COPY adaptive-strategy ./adaptive-strategy
+COPY common ./common
+COPY storage ./storage
+COPY model_loader ./model_loader
+COPY market-data ./market-data
+COPY database ./database
+COPY config ./config
+COPY services/backtesting_service ./services/backtesting_service
+COPY services/trading_service ./services/trading_service
+COPY services/ml_training_service ./services/ml_training_service
+COPY services/api_gateway ./services/api_gateway
+COPY services/load_tests ./services/load_tests
+COPY services/stress_tests ./services/stress_tests
+COPY services/integration_tests ./services/integration_tests
+COPY tests ./tests
+COPY migrations ./migrations
 
 # Build the application
 RUN cargo build --release -p backtesting_service