Fix audio file format for forms

[AhmarZaidi]

Issue: #1531

This PR fixes audio files recorded from form plugins being stored as video/webm instead of proper audio MIME types on GoDAM Central.

When audio files (.webm, .mp4) were uploaded via form recorders, the transcoding API was receiving job_type: "audio" but mime_type: "video/webm" which was incorrect. This was happening because wp_check_filetype() returns video/webm for container formats like .webm, .mp4 etc., that can hold both audio and video.

To fix this modified rtgodam_send_video_to_godam_for_transcoding() to set mimetype to audio/**** when job_type is "audio"

Testing Instructions

Test Case 1: Audio Recording

1. Create a form (any supported plugin) with GoDAM Recorder field
2. Enable "Audio" file selector in field settings
3. Record audio in browser
4. Submit form
5. Verify: On GoDAM Central, file shows as audio/webm (not video/webm)

Test Case 2: Video Recording (Regression)

1. Record video (not audio) in the same form
2. Submit form
3. Verify: File correctly shows as video/webm on GoDAM Central

Note: I tested with Edge, Chrome, Firefox and Safari to make sure all browser formats are working correctly.

Screenshots

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Minor Additional Changes

Added some minor additional fixes which are not directly related to the issue #1531:

• WPForms: On entries page audio preview was showing error when transcoding fails, fixed it by adding null check and 'audio/mpeg' to audio element's type attr instead of empty value.
• Ninja Forms: Updated label to Start Recording instead of Record Video to match other forms (haven't updated the same for Fluent Forms in this PR because that will be done by PR #1204)

Note: Fluent Form was tested by using changes from PR #1204.

[Copilot]

Pull request overview

This PR addresses incorrect MIME types being sent to GoDAM Central for audio recordings submitted via supported form plugins, ensuring audio container uploads (e.g., .webm, .mp4) are treated as audio when the transcoding job_type is audio.

Changes:

• Added a shared godam_get_job_type() helper to consistently determine job_type (audio vs stream) across form integrations.
• Updated multiple form integrations to use the shared job type helper instead of duplicating file-type detection logic.
• Adjusted rtgodam_send_video_to_godam_for_transcoding() to correct mime_type from video/* to audio/* when job_type is audio.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
inc/helpers/custom-functions.php	Adds godam_get_job_type() and fixes MIME type mapping for audio jobs when WordPress detects a video/* container MIME.
inc/classes/wpforms/class-wpforms-integration.php	Uses shared job-type detection when sending recorded files for transcoding.
inc/classes/sureforms/class-form-submit.php	Uses shared job-type detection before calling transcoding helper.
inc/classes/ninja-forms/class-ninja-forms-field-godam-recorder.php	Replaces custom MIME/extension logic with shared job-type detection and passes it through consistently.
inc/classes/gravity-forms/class-init.php	Determines job type per-file (including multi-file) via shared helper before transcoding.
inc/classes/gravity-forms/class-gf-field-godam-video.php	Simplifies audio/video detection by using godam_is_audio_file() for audio determination.
inc/classes/fluentforms/class-form-submit.php	Computes and passes job_type to transcoding call (previously relied on default).
inc/classes/everest-forms/class-everest-forms-integration.php	Uses shared job-type detection before sending for transcoding.

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