ci: add if: !cancelled() so test jobs run even if setup fails

The ghidra-setup job can fail due to transient GitHub API rate limits.
Test jobs have their own fallback setup step, so they should run
regardless. Using !cancelled() instead of always() means jobs still
get skipped if the workflow is manually cancelled.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.github/workflows/test.yml

@@ -118,6 +118,7 @@ jobs:
   # Job 3: Read-only integration tests (one bridge)
   readonly-integration:
     needs: ghidra-setup
+    if: ${{ !cancelled() }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 90
     # Windows Ghidra tests may exceed timeout on GH Actions free runners
@@ -187,6 +188,7 @@ jobs:
   # Job 4: Mutation tests (parallel with job 3)
   mutation-integration:
     needs: ghidra-setup
+    if: ${{ !cancelled() }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 90
     continue-on-error: ${{ matrix.os == 'windows-latest' }}
@@ -255,6 +257,7 @@ jobs:
   # Job 5: Infrastructure tests (parallel with jobs 3+4)
   infrastructure:
     needs: ghidra-setup
+    if: ${{ !cancelled() }}
     runs-on: ${{ matrix.os }}
     timeout-minutes: 90
     continue-on-error: ${{ matrix.os == 'windows-latest' }}