clang-tidy: resolve modernize-concat-nested-namespaces

[knoepfel]

Resolve modernize-concat-nested-namespaces clang-tidy warnings.

• Code quality

  • Replaced nested namespace syntax in form/form/technology.hpp with namespace form::technology.
  • Preserved all technology constants, helper functions, values, and behavior.
  • Resolved modernize-concat-nested-namespaces clang-tidy warnings.

• Documentation

  • Marked modernize-concat-nested-namespaces as complete.
  • Added the associated PR #804 reference to docs/dev/clang-tidy-fixes-2026-04.md.

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📝 Walkthrough

Walkthrough

The PR replaces nested namespace syntax in form/form/technology.hpp with namespace form::technology. It also marks the related clang-tidy checklist item complete and adds the PR reference.

Changes

Namespace modernization

Layer / File(s)	Summary
Modernize namespace syntax and tracking form/form/technology.hpp, docs/dev/clang-tidy-fixes-2026-04.md	The technology declarations use C++ nested namespace syntax without changing values or behavior. The checklist records the completed modernize-concat-nested-namespaces fix and PR reference.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

• Framework-R-D/phlex#756: Applies related clang-tidy declaration and style fixes.
• Framework-R-D/phlex#772: Updates the same clang-tidy tracking document for another check.

Suggested reviewers: beojan

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the clang-tidy warning resolved by the code and documentation changes.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
form/form/technology.hpp	66.66%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (66.66%) is below the target coverage (80.00%). You can increase the patch coverage or adjust the target coverage.

@@            Coverage Diff             @@
##             main     #804      +/-   ##
==========================================
+ Coverage   83.89%   84.03%   +0.13%     
==========================================
  Files         171      171              
  Lines        7234     7234              
  Branches      850      850              
==========================================
+ Hits         6069     6079      +10     
+ Misses        881      874       -7     
+ Partials      284      281       -3     

Flag	Coverage Δ
scripts	80.09% <ø> (ø)
unittests	86.00% <66.66%> (+0.20%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
form/form/technology.hpp	66.66% <66.66%> (ø)

... and 2 files with indirect coverage changes

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