Run preflight tests without unstable feature

CHANGELOG.md

@@ -10,6 +10,7 @@ have been removed to keep the changelog focused on Yeehaw's history.
 - replace lingering references from `tantivy` to `yeehaw`.
 - rename benchmark imports to use the `yeehaw` crate.
 - update examples to import the `yeehaw` crate instead of `tantivy`.
+- run preflight tests without enabling the `unstable` feature.
 
 ## Features/Improvements
 - add docs/example and Vec<u32> values to sstable [#2660](https://github.com/quickwit-oss/yeehaw/pull/2660)(@PSeitz)

INVENTORY.md

@@ -55,3 +55,5 @@ This inventory captures the direction of the rewrite and the major tasks require
     - Replace `unwrap` usage with a fallible API that reports unknown column types.
 13. **Fix failing doctests after crate rename**
     - Update examples referencing `tantivy` to `yeehaw` so `cargo test --doc` succeeds.
+14. **Replace nightly benches using `test::Bencher`**
+    - Migrate inline benchmarks to a stable harness so the `unstable` feature can be tested on stable Rust.

scripts/preflight.sh

@@ -2,5 +2,5 @@
 set -euo pipefail
 
 cargo fmt --all -- --check
-cargo test --workspace --all-features
-cargo test --doc --workspace --all-features
+cargo test --workspace
+cargo test --doc --workspace