docs: docstrings for pods and peas

[JoanFM]

No description provided.

[codecov]

Codecov Report

Merging #1867 (a0ebc5f) into master (28cc7c8) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master    #1867   +/-   ##
=======================================
  Coverage   86.17%   86.17%           
=======================================
  Files         146      146           
  Lines        6982     6982           
=======================================
  Hits         6017     6017           
  Misses        965      965           

Impacted Files	Coverage Δ
jina/flow/builder.py	73.91% <0.00%> (ø)

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[github-actions]

Latency summary

Current PR yields:

• 😶 index QPS at 1204, delta to last 3 avg.: -4%
• 😶 query QPS at 23, delta to last 3 avg.: +2%

Breakdown

Version	Index QPS	Query QPS
current	1204	23
0.9.28	1247	21
0.9.27	1279	23

Backed by latency-tracking. Further commits will update this comment.