[proton0210]

Closes #4752.

Deployment validation overwrote the required-parameter list for each parameter, allowing missing parameters to pass whenever the last required parameter was supplied. Append each required parameter so all missing values are reported.

Add eight regression cases covering both declaration orders, either missing parameter, both missing, both supplied, and an interleaved parameter with a default.

Validation: 2,953 unit tests passed; deployment-file and template-parameter checks passed. Three audit passes covered reproduction against unchanged upstream, regression testing, and final review with all four independent fixes applied together (3,027 unit/integration tests passed plus the separate schema-updater test; four data tests retain the default exclusion).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.71%. Comparing base (fd17da4) to head (0bcefee).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4753   +/-   ##
=======================================
  Coverage   94.71%   94.71%           
=======================================
  Files         439      439           
  Lines       15886    15886           
  Branches     3076     3076           
=======================================
  Hits        15046    15046           
  Misses        458      458           
  Partials      382      382           

Flag	Coverage Δ
unittests	94.71% <100.00%> (ø)

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