Clippy at the base: allow large_enum_variant on two huginn-mind enums, drop a let-and-return

cargo clippy -D warnings failed at df7507b on PipelineDocument (masking these downstream); the two enums
are returned once per commit or request, and admission.rs resolution matrix returned a let binding. Builds.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/huginn-mind/src/admission.rs

@@ -603,7 +603,7 @@ fn matrix(subject: PipelineKind, outcome: &ResolutionOutcome) -> bool {
     use PipelineKind as K;
     use ResolutionOutcome as O;
     let all = |by: &[PipelineRef], kind: K| by.iter().all(|supersessor| supersessor.kind == kind);
-    let fits = match (subject, outcome) {
+    match (subject, outcome) {
         (K::Target, O::Superseded { by }) => all(by, K::Target),
         (K::Question, O::Answered { by }) => by.kind == K::Ruling,
         (K::Question, O::Withdrawn { .. }) => true,
@@ -621,8 +621,7 @@ fn matrix(subject: PipelineKind, outcome: &ResolutionOutcome) -> bool {
         (K::Run, O::Recorded { .. } | O::Withdrawn { .. }) => true,
         (K::Resolution, O::Withdrawn { .. }) => true,
         _ => false,
-    };
-    fits
+    }
 }
 
 /// The resolution row: the sequence, the in-force subject, the matrix, the

crates/huginn-mind/src/receipt.rs

@@ -155,6 +155,7 @@ impl HuginnCommitReceipt {
 /// How a commit ended. An exact replay is decided by admission before the
 /// commit is attempted, so it is not an exit of the primitive.
 #[derive(Clone, Debug, PartialEq, Eq)]
+#[allow(clippy::large_enum_variant, reason = "one outcome per commit, returned once and matched at once")]
 pub(crate) enum CommitOutcome {
     /// The batch and its receipt landed whole.
     Committed(HuginnCommitReceipt),

crates/huginn-mind/src/wire.rs

@@ -102,6 +102,7 @@ impl HuginnMindRequest {
 /// transport failure: the read side carries `Refused`, the write side carries
 /// the outcome's own `Refused`.
 #[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize, JsonSchema)]
+#[allow(clippy::large_enum_variant, reason = "one answer per request; a document view is the answer a reader asked for")]
 pub enum HuginnMindResponse {
     Whoami(MindStatus),
     Admit(PipelineAdmissionOutcome),