feat(workflow): Filter content from card-type messages to streamline …

[lvxinyu-1117]

…LLM input.

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 77.86260% with 29 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
backend/crossdomain/impl/message/message.go	77.86%	20 Missing and 9 partials ⚠️

Files with missing lines	Coverage Δ
backend/crossdomain/impl/message/message.go	44.58% <77.86%> (+19.30%)	⬆️

... and 3 files with indirect coverage changes

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