- Add dedicated test-schema Makefile target (xdist logical, 600s timeout,
-m fuzz) so schemathesis runs separately from test-fuzz, which was
spinning up competing uvicorn workers per xdist process
- Exclude all test_schemathesis*.py files from FUZZ_FLAGS via --ignore
- Add schema to _ALL_SUITES between api and fuzz
- Add SCHEMA_QUICK env var (default 0): caps every max_examples to 100
across all four schemathesis files (4520 -> 600 total examples)
- Fix pre-push hook: use .311 venv and delegate to make test-all FAIL_FAST=0
instead of hand-rolling five separate pytest invocations
