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   3s ⏱️ -1s
55 tests ±0  55 ✅ ±0  0 💤 ±0  0 ❌ ±0 
97 runs  ±0  97 ✅ ±0  0 💤 ±0  0 ❌ ±0 

Results for commit 01b487e. ± Comparison against base commit ec6caa5.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Results

104 files  ±0  104 suites  ±0   21m 9s ⏱️ + 1m 8s
882 tests ±0  874 ✅ ±0  8 💤 ±0  0 ❌ ±0 
889 runs  ±0  881 ✅ ±0  8 💤 ±0  0 ❌ ±0 

Results for commit 01b487e. ± Comparison against base commit ec6caa5.

♻️ This comment has been updated with latest results.

[coveralls]

coverage: 48.589% (-0.1%) from 48.691%
when pulling 01b487e on fix/1115
into ec6caa5 on main.