feat(alpacabkfeeder): extended_hours config

[dakimura]

WHAT

• add extended_hours config in the AlpacaBrokerAPIFeeder plugin.
  • when extended_hours: false, TICK data during the off-hours (= time < openTime and time > closeTime) are dropped and not stored in DB, even when off_hours_schedule is set.
• see contrib/alpacabkfeeder/README.md for the details.

[codecov-commenter]

Codecov Report

Merging #613 (fcf8de3) into master (d517934) will decrease coverage by 0.07%.
The diff coverage is 78.12%.

@@            Coverage Diff             @@
##           master     #613      +/-   ##
==========================================
- Coverage   48.31%   48.23%   -0.08%     
==========================================
  Files         136      136              
  Lines       12966    12979      +13     
==========================================
- Hits         6265     6261       -4     
- Misses       6091     6107      +16     
- Partials      610      611       +1     

Impacted Files	Coverage Δ
contrib/alpacabkfeeder/configs/config.go	53.42% <54.54%> (-2.64%)	⬇️
contrib/alpacabkfeeder/feed/time_checker.go	57.14% <81.81%> (-29.82%)	⬇️
contrib/alpacabkfeeder/writer/snapshot_writer.go	98.55% <100.00%> (+0.24%)	⬆️