Improve documentation of robustness test adding key concepts used in the test

[serathius]

cc @ahrtr @fuweid @henrybear327 @siyuanfoundation @MadhavJivrajani @jmhbnz

[codecov-commenter]

:warning: Please install the to ensure uploads and comments are reliably processed by Codecov.

Codecov Report

Attention: Patch coverage is 47.72727% with 46 lines in your changes missing coverage. Please review.

Project coverage is 68.73%. Comparing base (f5acd17) to head (954d00c). Report is 65 commits behind head on main.

:exclamation: Current head 954d00c differs from pull request most recent head bd0d1a6

Please upload reports for the commit bd0d1a6 to get more accurate results.

Files with missing lines	Patch %	Lines
etcdctl/ctlv3/command/global.go	0.00%	12 Missing :warning:
etcdctl/ctlv3/command/make_mirror_command.go	0.00%	10 Missing :warning:
etcdctl/ctlv3/command/ep_command.go	0.00%	6 Missing :warning:
client/v3/mock/mockserver/mockserver.go	0.00%	4 Missing :warning:
client/v3/config.go	87.50%	1 Missing and 1 partial :warning:
client/v3/snapshot/v3_snapshot.go	0.00%	2 Missing :warning:
etcdctl/ctlv3/ctl.go	0.00%	2 Missing :warning:
pkg/netutil/netutil.go	50.00%	2 Missing :warning:
client/v3/client.go	80.00%	0 Missing and 1 partial :warning:
client/v3/experimental/recipes/key.go	50.00%	1 Missing :warning:
... and 4 more

:exclamation: Your organization needs to install the Codecov GitHub app to enable full functionality.

Additional details and impacted files

Files with missing lines	Coverage Δ
client/v3/lease.go	90.87% <100.00%> (ø)
client/v3/retry.go	79.48% <100.00%> (+0.17%)	:arrow_up:
client/v3/retry_interceptor.go	65.61% <100.00%> (ø)
client/v3/watch.go	92.84% <100.00%> (-0.80%)	:arrow_down:
etcdctl/ctlv3/command/printer_json.go	0.00% <ø> (ø)
etcdctl/ctlv3/command/watch_command.go	44.08% <ø> (ø)
pkg/adt/interval_tree.go	88.72% <ø> (ø)
pkg/expect/expect.go	79.12% <100.00%> (ø)
pkg/featuregate/feature_gate.go	87.66% <100.00%> (ø)
pkg/flags/flag.go	68.57% <100.00%> (ø)
... and 24 more

... and 21 files with indirect coverage changes

@@           Coverage Diff           @@
##             main   #18708   +/-   ##
=======================================
  Coverage   68.72%   68.73%           
=======================================
  Files         420      420           
  Lines       35494    35508   +14     
=======================================
+ Hits        24395    24405   +10     
- Misses       9665     9667    +2     
- Partials     1434     1436    +2     

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more Δ = absolute <relative> (impact), ø = not affected, ? = missing data Powered by Codecov. Last update f5acd17...bd0d1a6. Read the comment docs.

[jmhbnz]

/retest

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: fuweid, henrybear327, jmhbnz, serathius

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• ~~OWNERS~~ [jmhbnz,serathius]

Approvers can indicate their approval by writing /approve in a comment Approvers can cancel approval by writing /approve cancel in a comment