runs-on names a machine, not a purpose

The purpose-prefixed labels (hanzo-build-*, hanzo-deploy-*, hanzo-docs-build-*)
are retired in favour of the bare <os>-<arch> every runner already advertises.

They were not a capability, only a habit, and the habit cost builds: papers asked
for hanzo-build-linux-amd64, no online runner offered it, and two idle
linux-amd64 runners sat beside the queue while the build simply never ran. The
lux tree lost three days to lux-linux-amd64 the same way.

What a job is FOR is the workflow's name. runs-on is the machine it needs.

Co-authored-by: Hanzo Dev <[email protected]>

.hanzo/workflows/ci.yml

@@ -10,11 +10,11 @@ on:
 
 jobs:
   macos:
-    # hanzo-build-darwin-arm64: the label RUNNERS.md registers for the
-    # Apple pool. hanzo-build-macos-arm64 is not one it lists, and a job
+    # darwin-arm64: the label RUNNERS.md registers for the
+    # Apple pool. macos-arm64 is not one it lists, and a job
     # asking for a label no runner advertises queues forever rather than
     # failing — so the repo keeps looking like it has CI on this leg.
-    runs-on: hanzo-build-darwin-arm64
+    runs-on: darwin-arm64
     timeout-minutes: 90
     steps:
       - uses: actions/checkout@v4
@@ -26,7 +26,7 @@ jobs:
       - run: cargo test
 
   linux:
-    runs-on: hanzo-build-linux-arm64
+    runs-on: linux-arm64
     timeout-minutes: 60
     steps:
       - uses: actions/checkout@v4

.hanzo/workflows/release.yml

@@ -27,7 +27,7 @@ env:
 
 jobs:
   cli-darwin:
-    runs-on: hanzo-build-macos-arm64
+    runs-on: macos-arm64
     timeout-minutes: 90
     steps:
       - uses: actions/checkout@v4
@@ -45,9 +45,9 @@ jobs:
     strategy:
       matrix:
         include:
-          - runner: hanzo-build-linux-arm64
+          - runner: linux-arm64
             arch: aarch64
-          - runner: hanzo-build-linux-amd64
+          - runner: linux-amd64
             arch: x86_64
     runs-on: ${{ matrix.runner }}
     timeout-minutes: 90
@@ -66,10 +66,10 @@ jobs:
     strategy:
       matrix:
         include:
-          - runner: hanzo-build-linux-arm64
+          - runner: linux-arm64
             arch: aarch64
             target: aarch64-unknown-linux-musl
-          - runner: hanzo-build-linux-amd64
+          - runner: linux-amd64
             arch: x86_64
             target: x86_64-unknown-linux-musl
     runs-on: ${{ matrix.runner }}