[Wf-Diagnostics] Include failure issues identification and rootcause in diagnostics

[sankari165]

What changed?
Include failure issues identification and rootcause in diagnostics workflow

Why?
these invariants will become part of diagnostics

How did you test it?
unit tests

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Attention: Patch coverage is 75.94937% with 19 lines in your changes missing coverage. Please review.

Project coverage is 74.87%. Comparing base (084464e) to head (58d48b3).
Report is 11 commits behind head on master.

Files with missing lines	Patch %	Lines
service/worker/diagnostics/workflow.go	77.50%	5 Missing and 4 partials ⚠️
service/worker/diagnostics/activities.go	73.33%	4 Missing and 4 partials ⚠️
...ce/worker/diagnostics/invariant/timeout/timeout.go	60.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
...ce/worker/diagnostics/invariant/failure/failure.go	95.31% <100.00%> (ø)
service/worker/diagnostics/module.go	100.00% <100.00%> (ø)
...ce/worker/diagnostics/invariant/timeout/timeout.go	86.99% <60.00%> (+0.10%)	⬆️
service/worker/diagnostics/activities.go	74.57% <73.33%> (-4.22%)	⬇️
service/worker/diagnostics/workflow.go	81.81% <77.50%> (-0.64%)	⬇️

... and 9 files with indirect coverage changes

---

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 084464e...58d48b3. Read the comment docs.

[ketsiambaku]

LGTM