feat: Bump strawberry minumum version to 0.257.0

[bellini666]

Bump the minimum version of strawberry to 0.257.0, which contains strawberry.cast and allows us to mitigate GHSA-5xh2-23cc-5jc6

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request bumps the minimum version of Strawberry to 0.257.0 and introduces a new get_node_caster function to handle type casting of resolved nodes. It also modifies the is_type_of method to consider type casts when determining the type of an object.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Type casting is now handled by the get_node_caster function.	Added a new function get_node_caster to handle type casting of resolved nodes. Modified resolve_model_nodes and resolve_model_node to use the get_node_caster function for type casting. Added a type variable _T to support generic type casting in get_node_caster function	strawberry_django/relay.py
Updated the is_type_of method to consider type casts.	Modified the is_type_of method to check for type casts using get_strawberry_type_cast before checking instance types	strawberry_django/type.py
Bumped the minimum version of Strawberry to 0.257.0	Updated the strawberry-graphql dependency version in pyproject.toml. Regenerated poetry.lock to reflect the updated dependency version	pyproject.toml poetry.lock
Added tests for relay query	Added a new test file test_query.py to verify correct model resolution in relay queries. Added tests to check the correct model type is returned based on the provided node ID	tests/relay/test_query.py

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[sourcery-ai]

Hey @bellini666 - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟡 Testing: 1 issue found
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 93.75000% with 1 line in your changes missing coverage. Please review.

Project coverage is 89.05%. Comparing base (a30755f) to head (b1f19e1).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
strawberry_django/relay.py	90.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #688      +/-   ##
==========================================
+ Coverage   89.04%   89.05%   +0.01%     
==========================================
  Files          42       42              
  Lines        3823     3836      +13     
==========================================
+ Hits         3404     3416      +12     
- Misses        419      420       +1     

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