worker: name the binary weed-worker

It is the Rust side of `weed worker`, the way weed-volume is the Rust side of
`weed volume`, and lance is the first family of jobs it carries rather than
the only one it ever will. The crate keeps its own name: when a second family
arrives the bin target moves to a crate of its own, under this name.

Claude-Session: https://claude.ai/code/session_01Rkp1Mw5E89Jp6dzJFYiMrm

seaweed-worker/crates/lance/Cargo.toml

@@ -7,8 +7,11 @@ description = "SeaweedFS maintenance worker for Lance tables"
 [lib]
 name = "weed_lance_worker"
 
+# The binary is not named for lance: it is the Rust side of `weed worker`, and
+# the job families it registers will outgrow this crate. When a second one
+# arrives the bin target moves to a crate of its own under the same name.
 [[bin]]
-name = "weed-lance-worker"
+name = "weed-worker"
 path = "src/main.rs"
 
 [dependencies]

seaweed-worker/crates/lance/src/main.rs

@@ -13,8 +13,8 @@ use weed_lance_worker::metrics::LanceMetrics;
 /// language and an operator should not have to learn a second set of names.
 #[derive(Parser, Debug)]
 #[command(
-    name = "weed-lance-worker",
-    about = "SeaweedFS maintenance worker for Lance tables"
+    name = "weed-worker",
+    about = "SeaweedFS maintenance worker"
 )]
 struct Args {
     /// Admin server gRPC address.