fix: add precompute_engine and test_e2e_precompute bin stubs to Dockerfile dependency cache layer

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: zzylol

asap-query-engine/Dockerfile

@@ -20,10 +20,14 @@ COPY asap-query-engine/Cargo.toml ./asap-query-engine/
 COPY asap-planner-rs/Cargo.toml ./asap-planner-rs/
 
 # Create dummy source files so Cargo can resolve all workspace members
-RUN mkdir -p asap-query-engine/src && echo "fn main() {}" > asap-query-engine/src/main.rs && \
-    mkdir -p asap-query-engine/benches && echo "fn main() {}" > asap-query-engine/benches/simple_store_bench.rs && \
-    mkdir -p asap-planner-rs/src && echo "fn main() {}" > asap-planner-rs/src/main.rs && \
-    echo "pub fn placeholder() {}" >> asap-planner-rs/src/lib.rs
+# All explicit [[bin]] targets in Cargo.toml must have stubs here for the dependency cache layer
+RUN mkdir -p asap-query-engine/src/bin \
+    && echo "fn main() {}" > asap-query-engine/src/main.rs \
+    && echo "fn main() {}" > asap-query-engine/src/bin/precompute_engine.rs \
+    && echo "fn main() {}" > asap-query-engine/src/bin/test_e2e_precompute.rs \
+    && mkdir -p asap-query-engine/benches && echo "fn main() {}" > asap-query-engine/benches/simple_store_bench.rs \
+    && mkdir -p asap-planner-rs/src && echo "fn main() {}" > asap-planner-rs/src/main.rs \
+    && echo "pub fn placeholder() {}" >> asap-planner-rs/src/lib.rs
 
 # Build dependencies (this layer will be cached)
 WORKDIR /code/asap-query-engine