FIX: [activeorderbook] fix order tag empty

[anywhy]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 22.87%. Comparing base (232b030) to head (73ede2c).
Report is 44 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1961      +/-   ##
==========================================
+ Coverage   22.70%   22.87%   +0.16%     
==========================================
  Files         667      667              
  Lines       51200    51450     +250     
==========================================
+ Hits        11626    11767     +141     
- Misses      38706    38811     +105     
- Partials      868      872       +4     

Files with missing lines	Coverage Δ
pkg/bbgo/activeorderbook.go	26.25% <100.00%> (+0.62%)	⬆️

... and 11 files with indirect coverage changes

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