Fix: Set default for assists field to None in PlayerStat model

[zack-fathi]

This PR fixes a validation error encountered when the Transfermarkt API returns player stats without an "assists" field or with a placeholder value (such as "-"). The change made was this:

Updated the PlayerStat model to set a default value of None for assists, ensuring the API doesn't raise validation errors when this field is missing.

class PlayerStat(TransfermarktBaseModel):
    competition_id: str
    competition_name: str
    season_id: str
    club_id: str
    appearances: Optional[int]
    goals: Optional[int]
    assists: Optional[int] = None  # Set default to None to avoid validation errors
    yellow_cards: Optional[int]
    red_cards: Optional[int]
    minutes_played: Optional[int]

I have verified this change both through unit tests and manual testing. Specifically:

• I ran the API locally and retrieved stats for every Premier League player.
• The assists field now correctly handles missing or placeholder values (e.g., "-") and sets them to None, preventing validation errors.
• All expected data loaded successfully without triggering ResponseValidationError.

Summary by CodeRabbit

• Bug Fixes
  • Improved consistency for player assist statistics by ensuring that if an assist value isn’t provided, it now defaults to a safe, defined value for more reliable data handling.

[coderabbitai[bot]]

Walkthrough

The update modifies the PlayerStat class in app/schemas/players/stats.py by assigning a default value of None to the assists attribute. Previously, the attribute was declared without a default, and now it explicitly defaults to None when not provided during instantiation.

Changes

File(s)	Change Summary
app/schemas/.../stats.py	Updated PlayerStat.assists to have a default value of None.

Poem

I'm a hopping rabbit full of cheer,
Tweaking code brings joy so near.
In PlayerStat, a change so fine,
assists now defaults, making it divine.
With every line, my heart's aflutter—code magic in every clutter!
🐇✨

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