feat: use TypedDict for Python query codegen

[magicmark]

Use TypedDict for Python query codegen.

Description

• Change Python query codegen plugin to generate TypedDict classes instead of plain classes
• Use NotRequired for optional fields with default values (TypedDict doesn't support = syntax)
• Update documentation with new TypedDict output examples

🤖 Generated with Claude Code

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Issues Fixed or Closed by This PR

• strawberry query-codegen feedback + suggestions #4050

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• I have tested the changes and verified that they work and don't break anything (as well as I can manage).

Summary by Sourcery

Switch Python query code generation to use TypedDict-based result and input types and improve schema codegen handling of custom directives and errors.

New Features:

• Support custom directive definitions in schema code generation by skipping them without failing.

Enhancements:

• Generate Python query result and input types as TypedDicts instead of plain classes for better type safety.
• Represent optional fields with default values in generated Python code using NotRequired[...] annotations.
• Improve schema codegen error messages to report the actual unknown definition type name.

Documentation:

• Update query codegen documentation to show TypedDict-based Python output examples.
• Add release notes describing the TypedDict migration and custom directive handling in schema codegen.

Tests:

• Add a CLI schema codegen test to verify schemas with custom directives are processed successfully.

[sourcery-ai]

Reviewer's Guide

Updates the Python query code generation to emit TypedDict-based result and input types (using NotRequired for optional fields with defaults), teaches schema codegen to gracefully skip custom directive definitions and improves its error messaging, and refreshes tests/docs plus adds a release note for these behaviors.

File-Level Changes

Change	Details	Files
Generate TypedDict-based Python query result and input types, using NotRequired for optional fields with default values, and update snapshots/docs accordingly.	Change object-type codegen to emit classes inheriting from TypedDict rather than plain classes. Mark fields with default values as NotRequired[...] instead of using assignment-based defaults, and track required imports via typing_extensions. Regenerate Python codegen snapshot fixtures for queries, mutations, variables, unions, interfaces, fragments, Relay examples, and enums to match TypedDict output. Update query codegen documentation example to show TypedDict import and TypedDict-based classes. Add a release note describing the TypedDict/NotRequired migration and its semantics.	strawberry/codegen/plugins/python.py tests/codegen/snapshots/python/mutation_with_object.py tests/codegen/snapshots/python/union.py tests/codegen/snapshots/python/union_with_typename.py tests/codegen/snapshots/python/variables.py tests/codegen/snapshots/python/generic_types.py tests/codegen/snapshots/python/interface_fragments_with_spread.py tests/codegen/snapshots/python/union_with_typename_and_fragment.py tests/codegen/snapshots/python/mutation-fragment.py tests/codegen/snapshots/python/mutation.py tests/codegen/snapshots/relay/python/relay_nested_nodes.py tests/codegen/snapshots/relay/python/relay_variables.py tests/codegen/snapshots/python/interface_fragments.py tests/codegen/snapshots/python/multiple_types.py tests/codegen/snapshots/python/alias.py tests/codegen/snapshots/python/fragment.py tests/codegen/snapshots/python/interface.py tests/codegen/snapshots/python/interface_single_fragment.py tests/codegen/snapshots/python/union_return.py tests/codegen/snapshots/python/union_with_one_type.py tests/codegen/snapshots/python/with_directives.py tests/codegen/snapshots/relay/python/relay_alias.py tests/codegen/snapshots/relay/python/relay_fragment.py tests/codegen/snapshots/relay/python/relay_node_id.py tests/codegen/snapshots/python/basic.py tests/codegen/snapshots/python/multiple_types_optional.py tests/codegen/snapshots/python/nullable_list_of_non_scalars.py tests/codegen/snapshots/relay/python/relay_list.py tests/codegen/snapshots/python/custom_scalar.py tests/codegen/snapshots/python/enum.py tests/codegen/snapshots/python/optional_and_lists.py docs/codegen/query-codegen.md RELEASE.md
Teach schema codegen to skip custom directive definitions and improve the NotImplementedError message for unknown definitions, plus add a targeted CLI test.	Add handling for DirectiveDefinitionNode in schema codegen that simply skips custom directive definitions as they require no Python code generation. Change the NotImplementedError message to include the underlying GraphQL AST node class name instead of a generic object representation. Introduce a CLI test that verifies schema-codegen succeeds and generates types when the SDL includes a custom directive definition and usage.	strawberry/schema_codegen/__init__.py tests/cli/test_schema_codegen.py

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.21%. Comparing base (c8d6ae4) to head (21c18bf).
⚠️ Report is 219 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4089      +/-   ##
==========================================
- Coverage   94.22%   94.21%   -0.02%     
==========================================
  Files         541      541              
  Lines       35519    35521       +2     
  Branches     1877     1877              
==========================================
- Hits        33469    33466       -3     
- Misses       1739     1747       +8     
+ Partials      311      308       -3     

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[codspeed-hq]

Merging this PR will not alter performance

Summary

✅ 31 untouched benchmarks

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_{Comparing magicmark:query_codegen_using_typed_dicts (21c18bf) with main (c8d6ae4)}