- add `make test_examples` target to mk/golang.mk for consistency with test_unit/test_cli
- move example tests to separate parallel CI job (example-tests)
- example: use Bootstrap() with autoconf.FallbackBootstrapPeers for reliable bitswap
- example: increase context timeout to 10 minutes
- test: add 60s per-request timeout to GetClosestPeers (server has 30s routing timeout)
- test: reduce EventuallyWithT to 3 minutes (locally passes in under 1 minute)