Implement Signal Fusion Engine for prompt classification routing#437

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Copilot wants to merge 6 commits intomainfrom

copilot/implement-signal-fusion-engine

Commits on Oct 15, 2025

Initial plan
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Implement Signal Fusion Engine with expression parser and priority-based evaluation

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wangchen615
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Add comprehensive examples demonstrating fusion engine usage

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wangchen615
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Fix string literal formatting in examples to use consistent quote style

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wangchen615
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Fix quote consistency in example to match test file conventions

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wangchen615
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Add configuration guide and integration examples for fusion engine

Copilot
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wangchen615
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