Workspace warning count: 408 → 105.
Three buckets cleared:
* Auto-fixable (`cargo fix` + `cargo clippy --fix`): unused imports
removed, unused variables prefixed with `_`, deprecated method
calls updated. Applied across harmony, harmony-k8s, harmony-agent,
harmony_inventory_agent, the fleet/ workspace, and ~15 examples.
* Generated code (opnsense-api/src/generated/): 269 snake_case
warnings + ~10 unreachable-pattern warnings come from
CamelCase-preserving bindings to OPNsense's HAProxy/Caddy XML
schemas. Scoped a single `#[allow(non_snake_case,
unreachable_patterns)]` at `pub mod generated;` rather than
fighting the codegen — renaming would break serde round-trips
and the codegen would regenerate them anyway.
* opnsense-codegen parser's defensive `let...else` guards on
`XmlNode` (currently single-variant): file-level
`#![allow(irrefutable_let_patterns)]` with a comment explaining
why we keep the `else` arms (they re-arm if the IR grows a
second variant).
`harmony_inventory_agent::local_presence::{DiscoveryEvent,
discover_agents}` re-exports were stripped twice by the auto-fix
passes (consumers live in another crate, so the local crate looks
"unused" to lint). Anchored with explicit `pub use` + an
`#[allow(unused_imports)]` annotation noting why.
All 151 harmony lib tests still pass. Remaining ~105 warnings are
mostly real dead code in non-fleet modules + a handful of
unused-imports/variables clippy couldn't auto-resolve; cleared in
the next pass.