Fix race condition: onDefinition returns empty before validatePerlDocument completes #180
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…ument completes When textDocument/definition is called shortly after textDocument/didOpen, navSymbols may not be populated yet because validatePerlDocument spawns a slow Perl process (300-500ms+). Instead of returning empty, parse on-demand using the fast Node.js parser. This provides immediate results for local symbols while the full Perl compilation completes in the background. Fixes bscan#179
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Fixes #179