- Security & validation: tighten hash regex, add HTTP timeouts to all
requests, pass client.timeout through get_fragment_hash and AsyncClient
- Constants: move all constants to types/constants.py; remove re-exports
from types/__init__.py; add DEFAULT_TIMEOUT, REQUIRED_COOKIE_KEYS
- FragmentClient: add timeout param (default 30 s); async-context-manager
support; remove WALLET_CLASSES from public API
- Exceptions: remove dead INVALID_USERNAME constant (Fragment validates
server-side); keep full hierarchy intact
- Tests: add 006_test_methods_mock.py (6 mock tests for all 3 methods);
DRY-refactor 004_test_balance.py (_patch_wallet context manager);
clean up 005_test_methods.py (remove fragile network test, rename tests)
- Examples: switch all 4 examples to async-with; align error messages;
replace %-format with f-strings
- README: rewrite usage section with single comprehensive async-with
example covering all 3 methods and full exception hierarchy
- CI: add mypy step to lint job; add pytest-mock and mypy to dev deps;
set FORCE_JAVASCRIPT_ACTIONS_TO_NODE24 on all jobs; fix COOKIES_JSON
to job-level env var