chore: bump obikmer to 1.2.1 and disable obikindex default features

Updates the obikmer lockfile version to 1.2.1 and configures the obikindex dependency to explicitly disable default features. These are manifest and lockfile adjustments that do not modify source code or alter application behavior.

src/Cargo.lock

@@ -1793,7 +1793,7 @@ dependencies = [
 
 [[package]]
 name = "obikmer"
-version = "1.2.0"
+version = "1.2.1"
 dependencies = [
  "clap",
  "csv",

src/compare_sparse/Cargo.toml

@@ -8,7 +8,7 @@ name = "compare_sparse"
 path = "src/main.rs"
 
 [dependencies]
-obikindex = { path = "../obikindex" }
+obikindex = { path = "../obikindex", default-features = false }
 obicompactvec = { path = "../obicompactvec" }
 anyhow = "1"
 fastrand = "2"

src/obikmer/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "obikmer"
-version = "1.2.1"
+version = "1.2.2"
 edition = "2024"
 
 [[bin]]