utils/taggedV2: add "reducer" helper

[nl0]

TODO

• [ ] Unit tests

[codecov[bot]]

Codecov Report

Merging #2111 (8b5e827) into master (be647c1) will decrease coverage by 0.00%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master    #2111      +/-   ##
==========================================
- Coverage   46.58%   46.58%   -0.01%     
==========================================
  Files         425      425              
  Lines       20233    20236       +3     
  Branches     2337     2337              
==========================================
+ Hits         9426     9427       +1     
- Misses       9817     9819       +2     
  Partials      990      990              

Flag	Coverage Δ
api-python	89.69% <ø> (ø)
catalog	16.30% <50.00%> (+<0.01%)	:arrow_up:
lambda	92.87% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
catalog/app/utils/taggedV2.ts	92.00% <50.00%> (-8.00%)	:arrow_down:

---

Continue to review full report at Codecov.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update be647c1...8b5e827. Read the comment docs.

[drernie]

Seems obsolete. Feel free to re-open if you still care.