Fix batch result keys and callback

[vjik]

Q	A
Is bugfix?	✔️
New feature?	❌
Breaks BC?	❌

Related PRs:

• Adapt to batch changes in Yii DB active-record#454

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.41%. Comparing base (2dfe589) to head (681b254).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1063      +/-   ##
============================================
+ Coverage     98.38%   98.41%   +0.02%     
- Complexity     1641     1644       +3     
============================================
  Files           117      117              
  Lines          4337     4344       +7     
============================================
+ Hits           4267     4275       +8     
+ Misses           70       69       -1     

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