fix(ci): cap test-build debuginfo so the linker fits runner memory

Two runs (447, 486) died with 'ld terminated with signal 9' linking the
solitaire_engine test binary — the runner OOMs on full dev debuginfo for
the Bevy dependency graph. line-tables-only preserves file:line panic
backtraces at a fraction of the link footprint.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/test.yml

@@ -31,6 +31,13 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
+    # Full debuginfo made the solitaire_engine test-binary link peak past the
+    # runner's memory — ld was OOM-killed (signal 9) on runs 447 and 486.
+    # line-tables-only keeps file:line in panic backtraces while cutting the
+    # link's memory footprint enough to fit the runner.
+    env:
+      CARGO_PROFILE_DEV_DEBUG: line-tables-only
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4