chore: add pipeline status

[pinglin]

Because

• pipeline requires various statuses to reflect its situation

This commit

• bridge enum type defined in the db and protobuf
• close Align database naming with all backend services instill-core#854
• close Add pipeline error status instill-core#981

[codecov]

Codecov Report

Merging #45 (270f222) into main (36bffc6) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main      instill-ai/pipeline-backend#45   +/-   ##
=======================================
  Coverage   22.77%   22.77%           
=======================================
  Files           1        1           
  Lines         180      180           
=======================================
  Hits           41       41           
  Misses        123      123           
  Partials       16       16           

Flag	Coverage Δ
unittests	22.77% <0.00%> (ø)

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

Impacted Files	Coverage Δ
pkg/service/service.go	22.77% <0.00%> (ø)

---

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 36bffc6...270f222. Read the comment docs.