chore(lints): complete the canonical workspace lint set with clippy::all

[h4x0r]

What

Adds all = { level = "warn", priority = -1 } to [workspace.lints.clippy], completing the fleet-canonical lint set (CLAUDE.core.md → "Rust Lint Posture").

Why

This repo already denied correctness, suspicious, unwrap_used and expect_used, but the all group was never enabled — so clippy's style, complexity and perf lints outside the pedantic set were silently off. This is part of a fleet-wide sweep; the same shaped gap in other repos concealed a release-mode i64 overflow, a public-API panic, and a 16 GiB unbounded allocation from an untrusted length field.

Verification

Config-only change — zero sites lit up.

$ cargo clippy --all-targets --workspace -- -D warnings
    Finished `dev` profile [unoptimized + debuginfo] target(s)
$ cargo fmt --check      # clean
$ cargo build --workspace # clean
$ cargo test --workspace  # all suites pass, 0 failed

Diff is one line in the root Cargo.toml.

Scope note

Effective per-member configuration was checked, not just the root — every member inherits via [lints] workspace = true with no member-local [lints.clippy] table that would silently replace inheritance.

🤖 Generated with Claude Code