refactor: make hwlocality optional and streamline release workflow

Extracts release creation into a dedicated `create-release` job that outputs a shared `release_id`, allowing downstream build jobs to upload binaries directly and ensuring atomic initialization. Introduces a `numa` feature flag for `obikindex` to make `hwlocality` optional, providing graceful fallbacks like a synthetic UMA node when disabled. Also bumps `obikmer` to 1.1.16.

src/Cargo.lock

@@ -1704,7 +1704,7 @@ dependencies = [
 
 [[package]]
 name = "obikmer"
-version = "1.1.15"
+version = "1.1.16"
 dependencies = [
  "clap",
  "csv",

src/obikindex/Cargo.toml

@@ -17,4 +17,8 @@ serde            = { version = "1", features = ["derive"] }
 serde_json       = "1"
 indicatif        = "0.17"
 tracing          = "0.1.44"
-hwlocality       = { version = "1.0.0-alpha.11", features = ["vendored"] }
+hwlocality       = { version = "1.0.0-alpha.11", features = ["vendored"], optional = true }
+
+[features]
+default = ["numa"]
+numa    = ["hwlocality"]

src/obikindex/src/numa.rs

@@ -12,9 +12,13 @@ use std::sync::Arc;
 use std::time::{Duration, Instant};
 
 use crossbeam_channel::unbounded;
+#[cfg(feature = "numa")]
 use hwlocality::Topology;
+#[cfg(feature = "numa")]
 use hwlocality::cpu::binding::CpuBindingFlags;
+#[cfg(feature = "numa")]
 use hwlocality::cpu::cpuset::CpuSet;
+#[cfg(feature = "numa")]
 use hwlocality::object::types::ObjectType;
 use obisys::CpuSample;
 use tracing::debug;
@@ -40,6 +44,7 @@ impl NumaSetup {
 
 /// Detect NUMA topology and build per-node Rayon pools.
 /// Always succeeds: falls back to a single synthetic UMA node on failure.
+#[cfg(feature = "numa")]
 pub fn build() -> NumaSetup {
     if let Ok(topology) = Topology::new() {
         let nodes: Vec<Vec<usize>> = topology
@@ -81,8 +86,21 @@ pub fn build() -> NumaSetup {
     }
 }
 
+#[cfg(not(feature = "numa"))]
+pub fn build() -> NumaSetup {
+    let n_cores = std::thread::available_parallelism()
+        .map(|n| n.get())
+        .unwrap_or(1);
+    debug!("UMA: single synthetic node, {} core(s)", n_cores);
+    NumaSetup {
+        pools:         vec![None],
+        cpus_per_node: vec![(0..n_cores).collect()],
+    }
+}
+
 /// Bind the calling thread to `cpu_indices` using hwloc.
 /// Silently returns on any error so the thread still runs, just unbound.
+#[cfg(feature = "numa")]
 pub fn pin_current_thread(cpu_indices: &[usize]) {
     let Ok(topology) = Topology::new() else { return };
     let mut cpuset = CpuSet::new();
@@ -92,8 +110,12 @@ pub fn pin_current_thread(cpu_indices: &[usize]) {
     let _ = topology.bind_cpu(&cpuset, CpuBindingFlags::THREAD);
 }
 
+#[cfg(not(feature = "numa"))]
+pub fn pin_current_thread(_cpu_indices: &[usize]) {}
+
 // ── Internal helpers ──────────────────────────────────────────────────────────
 
+#[cfg(feature = "numa")]
 fn build_pool(cpus: &[usize]) -> Option<rayon::ThreadPool> {
     let cpus = cpus.to_vec();
     rayon::ThreadPoolBuilder::new()

src/obikmer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obikmer"
-version = "1.1.15"
+version = "1.1.16"
 edition = "2024"
 
 [[bin]]