Implement missing Spectrogram node for AudioProcess pipeline#136

Draft

Copilot wants to merge 7 commits intomainfrom

copilot/fix-spectrogram-node-issue

Commits on Nov 23, 2025

Initial plan
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Add Spectrogram node implementation with FactoryNode class

Copilot
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hackolite
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Fix matplotlib compatibility and add comprehensive tests for Spectrogram node

Copilot
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hackolite
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Address code review feedback: remove unused imports and cleanup code

Copilot
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hackolite
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Add comprehensive documentation for Spectrogram node fix (EN and FR)

Copilot
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hackolite
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Add verification script demonstrating complete Spectrogram node functionality

Copilot
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hackolite
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Add comprehensive implementation summary for Spectrogram node fix

Copilot
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hackolite
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