fix: add 11 missing test files to vitest config — 470 → 627 tests

decode, footer, format, iceberg, merge, page-processor, parquet-decode,
parquet, partial-agg, umami-conformance, and vip-cache tests were never
included in the node test run. All 627 pass.

Author: teamchong

vitest.config.ts

@@ -31,6 +31,17 @@ export default defineConfig({
       "src/descriptor-to-code.test.ts",
       "src/pg-wire/pg-wire.test.ts",
       "src/columnar.test.ts",
+      "src/decode.test.ts",
+      "src/footer.test.ts",
+      "src/format.test.ts",
+      "src/iceberg.test.ts",
+      "src/merge.test.ts",
+      "src/page-processor.test.ts",
+      "src/parquet-decode.test.ts",
+      "src/parquet.test.ts",
+      "src/partial-agg.test.ts",
+      "src/umami-conformance.test.ts",
+      "src/vip-cache.test.ts",
     ],
     hookTimeout: 300_000,
     testTimeout: 300_000,