refactor: reduce handler boilerplate in analysis and experts modules
analysis.rs: extract required_str, ok_response, err_response, prepare_analysis,
deal_to_json, is_closed_trade helpers — 15 granular handlers reduced from
~14 lines each to 4 lines each (-293 lines total).
experts.rs: extract scan_mql_dir (replaces 6 identical WalkDir loops),
BUILTIN_INDICATORS const (deduplicates list/search handlers), and
copy_mql_to_project (merges copy_indicator/copy_script into one impl,
public handlers delegate in 1 line each) (-256 lines total).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Devid HW
0ea1e779e0