chore: bump version to 1.1.21 and update obikindex features

Disables default features for the `obikindex` dependency and introduces a `[features]` block. The new `numa` feature is set as the default, conditionally enabling NUMA support in `obikindex`.

src/Cargo.lock

@@ -1704,7 +1704,7 @@ dependencies = [
 
 [[package]]
 name = "obikmer"
-version = "1.1.20"
+version = "1.1.21"
 dependencies = [
  "clap",
  "csv",

src/obikmer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obikmer"
-version = "1.1.20"
+version = "1.1.21"
 edition = "2024"
 
 [[bin]]
@@ -18,7 +18,7 @@ obikrope      = { path = "../obikrope" }
 obikpartitionner = { path = "../obikpartitionner" }
 obisys        = { path = "../obisys" }
 obiskio       = { path = "../obiskio" }
-obikindex     = { path = "../obikindex" }
+obikindex     = { path = "../obikindex", default-features = false }
 obitaxonomy   = { path = "../obitaxonomy" }
 obilayeredmap = { path = "../obilayeredmap" }
 clap          = { version = "4", features = ["derive"] }
@@ -33,4 +33,6 @@ tracing-subscriber = { version = "0.3", features = ["fmt", "env-filter"] }
 pprof = { version = "0.13", features = ["prost-codec"], optional = true }
 
 [features]
+default   = ["numa"]
+numa      = ["obikindex/numa"]
 profiling = ["dep:pprof"]