Fix/regex in path params

[GamerGirlandCo]

Description

this PR fixes a bug where path/template params with regex constraints (/sub/path/{type:something|orother}) are parsed incorrectly, resulting in validation errors when trying to marshal documents to YAML/JSON. given the previous example, {type:something|orother} would result in a template param with the name type:something|orother, instead of type.

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Refactor / code quality
• Other (describe):

Checklist

• make check passes locally (sync + tidy + lint + test)
• Tests added or updated to cover the change
• Golden files updated if spec output changed (make test-update)
• Relevant documentation updated (README, adapter README, etc.)
• Commit messages follow Conventional Commits

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[llamapreview]

AI Code Review by LlamaPReview

🎯 TL;DR & Recommendation

Recommendation: Approve with suggestions
This PR fixes a bug in path parameter parsing when regex constraints are present. The regex change correctly isolates the parameter name, and tests have been added for the new behavior, though some edge cases remain uncovered.

🌟 Strengths

• Solid fix: regex correctly isolates param name before :, reducing risk of validation errors.
• Tests added for primary scenarios.

💡 Suggestions (P2)

• internal/builder/builder.go: The regex change extracts the param name correctly, but the regex itself is not unit-tested, which could let edge cases (e.g., empty constraints, escaped braces) slip through and cause future bugs.
• internal/validate/utils_test.go: New tests cover basic regex constraints but omit edge cases like empty constraints and escaped braces, reducing regression confidence.

---

💡 Have feedback? We'd love to hear it in our GitHub Discussions.
✨ This review was generated by LlamaPReview Advanced, which is free for all open-source projects. Learn more.

[akfaiz]

Hi @GamerGirlandCo , thanks for your contribution.