GML-2067: Register PNG and GIF in TextExtractor supported MIME types

[Bharath-Tigergraph]

User description

This change extends TextExtractor.supported_extensions in common/utils/text_extractors.py so .png (image/png) and .gif (image/gif) are recognized alongside existing JPEG handling.

Why: Ingestion and downstream processing rely on this map to treat uploads as supported image types. Without these entries, PNG (and GIF) files could be mishandled or rejected even when image extraction paths are otherwise correct.

Scope: Adds two MIME mappings only; no behavioral changes elsewhere in the module.

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PR Type

Bug fix, Enhancement

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Description

• Register PNG and GIF MIME types

• Extend supported_extensions mapping in initializer

• Ensure PNG/GIF ingestion and extraction work

• No behavior changes elsewhere

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Diagram Walkthrough

flowchart LR
  TE["TextExtractor.__init__"]
  MAP["supported_extensions map"]
  PNG["Add .png -> image/png"]
  GIF["Add .gif -> image/gif"]

  TE -- "initializes" --> MAP
  MAP -- "now includes" --> PNG
  MAP -- "now includes" --> GIF

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File Walkthrough

	Relevant files
Enhancement	text_extractors.py Add PNG and GIF MIME mappings                                                        common/utils/text_extractors.py Added .png -> image/png mapping Added .gif -> image/gif mapping Expands image formats recognized by extractor +2/-0

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Here are some key observations to aid the review process:

⏱️ Estimated effort to review: 1 🔵⚪⚪⚪⚪

🧪 No relevant tests

🔒 No security concerns identified

⚡ Recommended focus areas for review Extension Normalization Verify that file extension handling is case-insensitive and normalized (e.g., '.PNG', '.Gif') so these map correctly to the added MIME types. '.png': 'image/png', '.gif': 'image/gif', GIF Handling Confirm downstream extraction paths gracefully handle GIFs (including animated GIFs) to avoid unexpected processing errors or performance overhead after enabling this type. '.png': 'image/png', '.gif': 'image/gif',

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