Python: Fix Python pyright package scoping and typing remediation (#4426)

* Fix Python pyright package scoping and typing remediation

Implements issue #4407 by removing the root pyright include, adding package-level pyright includes, and resolving pyright/mypy typing issues across Python packages. Also cleans unnecessary casts and applies line-level, rule-specific ignores where external libraries are too dynamic.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Reduce pyright cost in handoff cloning

Simplify cloned_options construction in HandoffAgentExecutor to avoid expensive TypedDict narrowing/inference in _handoff.py, which was causing pyright to spend a long time in orchestrations.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix types

* Fix lint and type-check regressions

Resolve current Python package check failures across lint, pyright, and mypy after recent code changes, including purview/declarative pyright issues and multiple ruff simplification findings.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fixed hooks

* Stabilize package tests and test tasks

Resolve cross-package non-integration test failures, simplify streaming type flow, harden locale/culture handling, and standardize package test poe tasks to exclude integration tests where applicable.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* lots of small fixes

* Fix current Python test regressions

Address current failing unit tests in azure-ai, bedrock, and azure-cosmos while keeping Bedrock parsing logic inline (no new static helper methods).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* small fixes

* small fixes

* removed pydantic from json

* final updates

* fix core

* fix tests

* fix obser

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Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

python/pyproject.toml

@@ -183,10 +183,11 @@ omit = [
 ]
 
 [tool.pyright]
-include = ["agent_framework*"]
+exclude = ["**/tests/**", "**/.venv/**", "packages/devui/frontend/**"]
 typeCheckingMode = "strict"
 reportUnnecessaryIsInstance = false
 reportMissingTypeStubs = false
+reportUnnecessaryCast = "error"
 
 [tool.mypy]
 plugins = ['pydantic.mypy']