ci: stop a hung step from costing an afternoon

.github/workflows/ci.yml

@@ -12,14 +12,23 @@ permissions:
 jobs:
   quality:
     runs-on: ubuntu-latest
+    # A step that hangs rather than fails gets the six-hour default, and the job
+    # is killed without uploading a log, so it reports nothing about what stalled.
+    # One apt-get did exactly that for 80 minutes. Every job below is bounded at
+    # roughly ten times its observed runtime: slow enough never to cut off real
+    # work, fast enough that a stall costs a re-run instead of an afternoon.
+    timeout-minutes: 30
     steps:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
         with:
           toolchain: 1.95.0
           components: rustfmt, clippy
       - uses: Swatinem/rust-cache@v2
-      - run: sudo apt-get update && sudo apt-get install -y jq
+      # gates.sh needs jq, which ubuntu-latest ships preinstalled. The apt-get
+      # that used to stand here only ever reported "already the newest version",
+      # so it bought a network dependency and a hang for nothing. If a future
+      # image drops jq, gates.sh says so outright instead of stalling.
       - run: scripts/gates.sh
 
   cross-platform:
@@ -28,6 +37,7 @@ jobs:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
     runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
     steps:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
@@ -48,6 +58,7 @@ jobs:
 
   dependency-audit:
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v7
       - uses: EmbarkStudios/cargo-deny-action@v2
@@ -57,6 +68,7 @@ jobs:
 
   supply-chain:
     runs-on: ubuntu-latest
+    timeout-minutes: 15
     steps:
       - uses: actions/checkout@v7
         with: