document local-http test behavior under restricted environments

Author: danieljake

README.md

@@ -140,6 +140,10 @@ cargo fmt -- --check
 cargo clippy --all-targets --all-features -- -D warnings
 ```
 
+Notes:
+- `cargo test --all-features` includes the optional local HTTP integration test.
+- `crawler_runs_end_to_end_with_local_http_server` is resilient to restricted hosts: it attempts to start a local mock listener and gracefully skips execution if the environment forbids binding loopback sockets (common in hardened CI sandboxes).
+
 ## Benchmarking and fuzz checks
 
 ```bash
@@ -196,3 +200,5 @@ cargo clippy --manifest-path Cargo.toml --all-targets --all-features -- -D warni
 cargo check --manifest-path Cargo.toml --all-targets --all-features
 cargo test --manifest-path Cargo.toml --all-targets --all-features
 ```
+
+CI also runs the full workspace test suite with `--all-features`, including `local-http-tests`, so the integration test behaves as described above in a real network-capable environment.