fix: openAPI mutability #1115

[yshyn-iohk]

Description:

This PR fixes issue #1115: OAS is mutated from build to build because of Instant.now() and UUID.random() functions were used in the annotations.

I tried to implement the integration tests, but it's not trivial and fragile because the Tapir OAS is static and a lot of classes must be reloaded or isolated in the dedicated classloader.

Checklist:

• My PR follows the contribution guidelines of this project
• My PR is free of third-party dependencies that don't comply with the Allowlist
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have checked the PR title to follow the conventional commit specification

[github-actions]

Integration Test Results

20 files  ±0  20 suites  ±0   2s ⏱️ ±0s
55 tests ±0  55 ✅ ±0  0 💤 ±0  0 ❌ ±0 
97 runs  ±0  97 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 073a12d. ± Comparison against base commit 37a8f41.

[github-actions]

Unit Test Results

104 files  ±0  104 suites  ±0   20m 27s ⏱️ + 3m 11s
882 tests ±0  874 ✅ ±0  8 💤 ±0  0 ❌ ±0 
889 runs  ±0  881 ✅ ±0  8 💤 ±0  0 ❌ ±0 

Results for commit 073a12d. ± Comparison against base commit 37a8f41.

[coveralls]

coverage: 48.817% (+0.2%) from 48.642%
when pulling 073a12d on fix/1115
into 37a8f41 on main.