Run clippy, docs and tests for tines-core with --no-default-features, gating the MemStore-based tests on `alloc` so they compile there. Fail on rustdoc warnings, pass --locked everywhere, and pin the toolchain to 1.99.0. In the workflow, use read-only permissions, cancel superseded runs, add a 20-minute timeout, and pin actions to commit SHAs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>