chore(clippy): add unwrap-used baseline

Enable clippy's unwrap_used lint at warn level, document the long-term
policy carveouts for tests and LockResult, and localize the generated
OpenAPI client exemption so the remaining warning surface is real repo
code.

Cargo.toml

@@ -106,6 +106,7 @@ empty_structs_with_brackets = "warn"
 disallowed_methods = "deny"
 exit = "warn"
 get_unwrap = "warn"
+unwrap_used = "warn"
 rc_buffer = "warn"
 rc_mutex = "warn"
 rest_pat_in_fully_bound_structs = "warn"

clippy.toml

@@ -1,5 +1,7 @@
 absolute-paths-max-segments = 2
 absolute-paths-allowed-crates = ["std", "core", "alloc"]
+allow-unwrap-in-tests = true
+allow-unwrap-types = ["std::sync::LockResult"]
 disallowed-methods = [
   { path = "std::thread::sleep", reason = "Prefer tokio::time::sleep on Tokio paths; document intentional blocking sleeps with #[expect(clippy::disallowed_methods, reason = \"...\")]", replacement = "tokio::time::sleep" },
   { path = "std::thread::spawn", reason = "Prefer Tokio task APIs on async paths; document intentional dedicated OS threads with #[expect(clippy::disallowed_methods, reason = \"...\")]" },

lib/crates/fabro-api/src/lib.rs

@@ -5,6 +5,7 @@
     clippy::disallowed_methods,
     clippy::disallowed_types,
     clippy::needless_lifetimes,
+    clippy::unwrap_used,
     unreachable_pub,
     unused_imports,
     reason = "Generated OpenAPI client code intentionally preserves codegen output."