docs: update test count 600+ → 735+ in architecture page

Author: teamchong

docs/src/content/docs/architecture.mdx

@@ -269,6 +269,6 @@ Tests run in two runtimes:
 |---------|------|-------|
 | **workerd** (real CF Workers) | Operators, DOs, decode, format parsing | — |
 | **Node** | DuckDB conformance (1M-5M rows), fixture files, SQL, infra | — |
-| **Total** | All runtimes | **600+ tests** |
+| **Total** | All runtimes | **735+ tests** |
 
 Conformance tests validate every operator against DuckDB at scale. CI benchmarks compare QueryMode vs DuckDB on every push.