fix(docs): resolve Linux-gated rustdoc warnings the new doc gate surfaced

Only documented on Linux, so invisible to every macOS-side check:
seqlock guard and gpu::uvm links in aether-stream, PageWeights link in
the uffd eviction docs (now via the public re-export).

Author: electricapp

crates/aether-stream/src/feature_table.rs

@@ -240,7 +240,7 @@ impl FeatureTable {
     /// # Panic safety
     /// If the user-supplied `features` slice access — or any code path inside
     /// this function — panics between steps 1 and 4, an internal
-    /// [`SeqlockWriteGuard`] still runs and forces head to an even value
+    /// `SeqlockWriteGuard` still runs and forces head to an even value
     /// (`prev + 2`, abandoning the in-progress generation). Without this,
     /// any reader that observed the odd head would spin forever waiting for
     /// the write to complete.

crates/aether-stream/src/span.rs

@@ -5,7 +5,7 @@
 //! a DMA descriptor list — pays per range, not per byte, so the number of
 //! ranges is the cost that matters.
 //!
-//! Lives outside the GPU module although [`gpu::uvm`](crate::gpu::uvm) is
+//! Lives outside the GPU module although `gpu::uvm` is
 //! its caller: the arithmetic needs no CUDA, and behind the `gpudirect`
 //! feature its tests would only ever be type-checked, never run.
 

crates/aethergraph-core/src/features/store.rs

@@ -517,7 +517,7 @@ impl FeatureStore {
     /// the gather code indexes exactly like a mapping, but residency is
     /// bounded by the caller instead of by kernel policy, and eviction
     /// follows `weights` — pass node degrees (see
-    /// [`PageWeights::from_node_degrees`]) so a hot hub node's pages
+    /// [`PageWeights::from_node_degrees`](crate::PageWeights::from_node_degrees)) so a hot hub node's pages
     /// outlive a cold leaf's.
     ///
     /// Requires `vm.unprivileged_userfaultfd=1` or `CAP_SYS_PTRACE`;