Apply buildQueryKey across entire library for object data parity

[JonnyWong16]

Description

Apply the _buildQueryKey function from #1593 across the entire PlexAPI library to ensure data parity in all object responses.

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the docstring for new or existing methods
• I have added tests when applicable

[Copilot]

Pull request overview

This PR expands usage of the shared _buildQueryKey helper across PlexAPI object-fetching methods to consistently include includeGuids and other query params, improving response parity for partial/related object lookups.

Changes:

• Replaced hand-built query strings (and some plain keys) with _buildQueryKey(...) across video/audio/photo/playlist/library/collection/mixins.
• Updated PlexObject._buildQueryKey to correctly append parameters when the input key already contains an existing query string (?).
• Standardized a few fetch patterns by building the key first, then calling fetchItem/fetchItems.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
plexapi/base.py	Fixes _buildQueryKey to merge params with keys that already contain ?.
plexapi/library.py	Applies _buildQueryKey to hubs/onDeck/recentlyAdded/search/tag/filter fetches.
plexapi/video.py	Applies _buildQueryKey to onDeck and parent/grandparent fetches for show/season/episode relations.
plexapi/audio.py	Applies _buildQueryKey to nearest/allLeaves/parent relations and station fetches.
plexapi/photo.py	Applies _buildQueryKey to children/parent lookups for albums/photos/clips.
plexapi/playlist.py	Applies _buildQueryKey to playlist item retrieval endpoint.
plexapi/collection.py	Applies _buildQueryKey to collection children retrieval.
plexapi/mixins/objects.py	Applies _buildQueryKey to extras and related hubs mixins.
plexapi/media.py	Applies _buildQueryKey to media tag items() retrieval.

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[Copilot]

Pull request overview

Copilot reviewed 10 out of 10 changed files in this pull request and generated 2 comments.

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