Fix runtime AttributeError in wordnet type casts, improve type safety and API contracts #141

	# SPDX-FileCopyrightText: 2016-2026 PyThaiNLP Project
	# SPDX-License-Identifier: Apache-2.0

	name: Type check

	on:
	push:
	branches:
	- dev
	paths-ignore:
	- '**.cff'
	- '**.json'
	- '**.md'
	- '**.rst'
	- '**.txt'
	- 'docs/**'
	pull_request:
	branches:
	- dev
	paths-ignore:
	- '**.cff'
	- '**.json'
	- '**.md'
	- '**.rst'
	- '**.txt'
	- 'docs/**'

	# Avoid duplicate runs for the same source branch and repository.
	# For pull_request events, uses the source repo name from
	# github.event.pull_request.head.repo.full_name; otherwise uses github.repository.
	# For push events, uses the branch name from github.ref_name.
	# For pull_request events, uses the source branch name from github.head_ref.
	# This ensures events for the same repo and branch share the same group,
	# and avoids cross-fork collisions when branch names are reused.
	concurrency:
	group: >-
	${{ github.workflow }}-${{
	github.event.pull_request.head.repo.full_name \|\| github.repository
	}}-${{ github.head_ref \|\| github.ref_name }}
	cancel-in-progress: true

	jobs:
	mypy:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	steps:
	- name: Checkout
	uses: actions/checkout@v6

	- name: Set up Python
	uses: actions/setup-python@v6
	with:
	python-version: "3.9"
	cache: "pip"

	- name: Install mypy
	run: \|
	pip install .
	pip install mypy

	- name: Run mypy
	run: mypy pythainlp

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