feat: support InsertsRequest

[yuanbohan]

What's changed and what's your intention?

• upgrade proto to support InsertsRequest
• support more datatypes

Checklist

• I have added the necessary unit tests and integration tests.

[codecov]

Codecov Report

Merging #81 (77ea424) into main (373a210) will increase coverage by 0.54%.
The diff coverage is 83.54%.

@@            Coverage Diff             @@
##             main      #81      +/-   ##
==========================================
+ Coverage   82.07%   82.61%   +0.54%     
==========================================
  Files          12       12              
  Lines         859      903      +44     
==========================================
+ Hits          705      746      +41     
- Misses        117      119       +2     
- Partials       37       38       +1     

Impacted Files	Coverage Δ
metric.go	78.68% <50.00%> (-2.02%)	⬇️
insert.go	94.73% <92.85%> (-5.27%)	⬇️
client.go	50.00% <100.00%> (ø)
series.go	93.83% <100.00%> (+6.93%)	⬆️
stream_client.go	45.45% <100.00%> (ø)
util.go	100.00% <100.00%> (ø)