fix: seed-transpile-check treats invalid seeds as warnings not failures

Evolution can produce syntactically invalid seeds (e.g. missing
DYADIC.<= before EXEC.IF). These transpiler errors should not block
CI — only forge compilation failures of successfully transpiled seeds
are real regressions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.woodpecker/ci.yml

@@ -127,8 +127,7 @@ steps:
             name=$(basename "$seed")
             echo "--- Transpiling $name ---"
             if ! npx tsx tools/push3-transpiler/src/index.ts "$seed" onchain/src/OptimizerV3Push3.sol; then
-              echo "FAIL: $name failed to transpile" >&2
-              failed=1
+              echo "WARN: $name failed to transpile (invalid program) — skipping" >&2
               continue
             fi
             echo "--- Compiling $name ---"