providers now per-agent: z.ai rides, bifrost stays home

Vanguard gets his own inference pipe. z.ai GLM Coding Plan, /paas/v4.
BifrostClient learned to leave versioned URLs alone. ProviderRegistry
dispatches per agent; every engine asks who it's talking to before
dialing. Annie and Hal none the wiser.

Cargo.lock

@@ -1308,6 +1308,15 @@ dependencies = [
  "zeroize",
 ]
 
+[[package]]
+name = "chord_macro"
+version = "0.1.0"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.117",
+]
+
 [[package]]
 name = "chord_macro"
 version = "0.1.0"
@@ -8419,8 +8428,10 @@ dependencies = [
  "anyhow",
  "arboard",
  "async-trait",
+ "axis2d",
  "axum",
  "base64 0.22.1",
+ "chord_macro 0.1.0",
  "chrono",
  "clap 4.6.1",
  "clap_complete",
@@ -10253,7 +10264,7 @@ version = "0.1.5"
 dependencies = [
  "axis2d",
  "base64-simd",
- "chord_macro",
+ "chord_macro 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "image",
  "libc",
  "nonmax",