Upgrade up-rust to 0.9.0

[PLeVasseur]

Summary

• Upgrade [workspace.dependencies].up-rust from 0.5.0 to crates.io 0.9.0.
• Align workspace rust-version from 1.76 to 1.82 because up-rust 0.9.0 declares rust_version = 1.82 on crates.io.
• No code-level compatibility adaptations were required for listener/filter URI validation, payload extraction strictness, or communication API usage; existing code/tests compiled and ran successfully.

Crates.io Target Confirmation

• crates.io API endpoint https://crates.io/api/v1/crates/up-rust reports:
  • max_version = 0.9.0
  • max_stable_version = 0.9.0
  • yanked = false

Lockfile Update

• Ran: cargo update -p up-rust --precise 0.9.0
• Local lockfile resolves up-rust 0.9.0 after update.
• Cargo.lock is intentionally gitignored in this library workspace, so no lockfile diff is included in this PR.

Validation

Commands run from repo root:

source build/envsetup.sh highest
cargo check --all-targets
cargo clippy --all-targets -- -W warnings -D warnings
cargo test -- --test-threads 1

Outcomes:

• cargo check --all-targets: pass
• cargo clippy --all-targets -- -W warnings -D warnings: pass
• cargo test -- --test-threads 1: first rerun cycle saw the known publisher_subscriber flaky one-message miss (86 sent / 85 received), then reran full serial suite once per project guidance and it passed.