release(broker): 0.9.2 — dependency refresh

[mack42]

Broker-only patch release; ramqp (0.8.2) and ramqp-core (0.2.5) are unchanged.

Changes

• Regenerated Cargo.lock via cargo update: clap 4.6.5, clap_builder 4.6.5, displaydoc 0.2.7, hybrid-array 0.4.14, tokio-macros 2.7.2 (plus client-only http 1.5.0, rustls 0.23.43). The lockfile ships inside the ramqp-broker package, so cargo install ramqp-broker --locked builds against these versions.
• Bumped ramqp-broker to 0.9.2; CHANGELOG dated 2026-07-31; README crate-status refreshed.
• No manifest-minimum, code, or API changes.

Verification

• cargo test and cargo test --all-features: all green (client 29 + core 103 + broker 59 unit tests; all broker integration suites incl. conformance, cluster, quorum, transactions).
• Real-broker interop: 6/6 tests/broker.rs tests pass against RabbitMQ 4.3.1.
• cargo clippy --all-targets --all-features -- -D warnings: clean.
• cargo publish --dry-run succeeds for all three crates (broker at 0.9.2).

After merge: tag v0.9.2-broker on the merge commit → release.yml publishes (core/client steps no-op as "already exists").