fix(docs/examples): propagate forge build failures in compile-solidity

docs/examples/bootstrap.sh

@@ -96,20 +96,31 @@ function compile-solidity {
 
   mkdir -p "$OUTPUT_DIR"
 
-  # Compile using the local foundry.toml with proper remappings
+  # Compile using the local foundry.toml with proper remappings.
+  # forge fetches solc from binaries.soliditylang.org on first use; transient
+  # DNS/TLS failures there have silently produced partial builds in CI (the loop
+  # kept going and compile-solidity returned success while an example's artifacts
+  # were never written). Wrap each forge build in ci3/retry and propagate any
+  # per-subdir failure so run_step retries the whole step.
   (
     cd "$SOLIDITY_DIR"
     for subdir in */; do
       if [ -d "$subdir" ] && ls "$subdir"/*.sol >/dev/null 2>&1; then
         local subdir_name=$(basename "$subdir")
         echo_stderr "Compiling $subdir_name..."
-        forge build \
-          --contracts "$subdir" \
-          --out "$OUTPUT_DIR/$subdir_name" \
-          --no-cache
+        if ! retry "forge build --contracts $subdir --out $OUTPUT_DIR/$subdir_name --no-cache"; then
+          echo "$subdir_name" >> "$OUTPUT_DIR/.failed"
+        fi
       fi
     done
   )
+  if [ -f "$OUTPUT_DIR/.failed" ]; then
+    local failed_subdirs=()
+    while IFS= read -r name; do failed_subdirs+=("$name"); done < "$OUTPUT_DIR/.failed"
+    rm -f "$OUTPUT_DIR/.failed"
+    echo_stderr "ERROR: Solidity compilation failed for: ${failed_subdirs[*]}"
+    return 1
+  fi
 
   echo_stderr "Solidity artifacts written to $OUTPUT_DIR"
 }