test: cover URL canonicalization utilities

[saurabhhhcodes]

Summary\n- add Jest coverage for numeric path segment canonicalization\n- verify UUID and high-entropy path segments are normalized\n- cover root path preservation and normalizeUrl query/hash removal\n\n## Validation\n- npm test -- --runInBand\n- node --check tests/utils/canonicalize.test.js\n- git diff --check\n\nCloses #3

Suggested GSSoC labels

If accepted for scoring, this should fit gssoc, level:beginner, dx, type:testing, quality:clean based on the linked issue labels and the focused validation in this PR.

[saurabhhhcodes]

Quick status for review: this PR is mergeable from GitHub's side and intentionally scoped to the linked apidrift-cli issue.

Validation already included in the PR body:

• focused Jest coverage for the touched behavior
• syntax check for the touched test/source file where applicable
• git diff --check

I also added the suggested GSSoC scoring labels in the PR body so maintainers can apply them directly if the change is accepted.

[saurabhhhcodes]

Hi @tanmayjoddar, this PR is still open, mergeable, and clean against the current base branch. I rechecked the repo test baseline locally (node --experimental-vm-modules node_modules/jest/bin/jest.js -> 3 suites / 11 tests passed). Please review when you get a chance, and add the GSSoC labels on the PR to mirror the linked issue if you plan to merge it.