feat(DEVC-265): add py typed for improve type hinting

[kossman]

Rationale

Ensure app code quality developed by users that use type hinting and mypy static type checker.

Goal

Currently mypy will skip corva-sdk. Add a py.typed file so that mypy will know to use our type annotations.

Changes

• Typing metadata

  • Add src/corva/py.typed
  • Include package data; add “Typing :: Typed” classifier

• mypy

  • Bump to >=1.10,<2
  • Move CLI flags into ; Makefile runs plain mypy pyproject.toml
  • Set python_version="3.9", mypy_path="src"
  • Enable , explicit_package_bases``check_untyped_defs
  • Clean up overrides: + ; keep third‑party ; silence and docs.*``ignore_errors``ignore_missing_imports``ignore_missing_imports``mock.*``tests.*
  • Remove ad-hoc exclude patterns for docs tutorials

• Code tweaks for stricter typing

  • Add targeted cast(...) and a single # type: ignore[call-arg]

Jira task

DEVC-265

[kossman]

Will be shipped as a part of that PR