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## Why `codex-core` enabled `deterministic_process_ids` through a self dev-dependency. That forced a second feature-resolved build of the same crate, which increased compile time and test latency. ## What Changed - Removed the `deterministic_process_ids` feature from `codex-rs/core/Cargo.toml`. - Removed the self dev-dependency on `codex-core` that enabled that feature. - Removed the Bazel `deterministic_process_ids` crate feature for `codex-core`. - Added a test-only `AtomicBool` override in unified exec process-id allocation. - Added a test-support setter for that override and re-exported it from `codex-core`. - Enabled deterministic process IDs in integration tests via `core_test_support` ctor. ## Behavior - Production behavior remains random process IDs. - Unit tests remain deterministic via `cfg(test)`. - Integration tests remain deterministic via explicit test-support initialization. ## Validation - `just fmt` - `cargo test -p codex-core unified_exec::` - `cargo test -p codex-core --test all unified_exec -- --test-threads=1` - `cargo tree -p codex-core -e features` (verified the removed feature path)