feat(blueprints): add basis for blueprint update flow

[rmnbrd]

Summary

Issue:

Screenshots / Recordings

Testing

• Changes tested locally in the relevant Console's pages and Storybooks
• yarn test or yarn test -u (if you need to regenerate snapshots)
• yarn format
• yarn lint

PR Checklist

• I followed naming, styling, and TypeScript rules (see .cursor/rules)
• I performed a self-review (diff inspected, dead code removed)
• I titled the PR using Conventional Commits with a scope when possible (e.g. feat(service): add new Terraform service) - required for semantic-release
• I only kept necessary comments, written in English (watch for useless AI comments)
• I involved a designer to validate UI changes if I am not a designer
• I covered new business logic with tests (unit)
• I confirmed CI is green (Codecov red can be accepted)
• I reviewed and executed locally any AI-assisted code

[codecov]

Codecov Report

❌ Patch coverage is 27.02703% with 189 lines in your changes missing coverage. Please review.
✅ Project coverage is 46.99%. Comparing base (c347652) to head (f6b2d0d).
⚠️ Report is 9 commits behind head on staging.

Files with missing lines	Patch %	Lines
...ce-update-flow/blueprint/blueprint-update-flow.tsx	0.00%	147 Missing ⚠️
...view-socket/use-blueprint-update-preview-socket.ts	68.35%	13 Missing and 12 partials ⚠️
...service-overview/service-header/service-header.tsx	60.00%	5 Missing and 3 partials ⚠️
...hooks/use-update-blueprint/use-update-blueprint.ts	0.00%	6 Missing ⚠️
...ws-subscription/use-react-query-ws-subscription.ts	66.66%	1 Missing and 1 partial ⚠️
...w-blueprint-update/use-preview-blueprint-update.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           staging    #2799      +/-   ##
===========================================
+ Coverage    46.92%   46.99%   +0.06%     
===========================================
  Files         1251     1183      -68     
  Lines        26771    25762    -1009     
  Branches      7804     7719      -85     
===========================================
- Hits         12562    12106     -456     
+ Misses       12052    11559     -493     
+ Partials      2157     2097      -60     

Flag	Coverage Δ
unittests	46.99% <27.02%> (+0.06%)	⬆️

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