fix(changelog): pin git-cliff remote so compare links resolve

[peczenyj]

Problem

The changelog footer's compare/tree links render as https://github.com///compare/... (empty owner/repo) for every version v0.1.0–v0.5.2. The footer template uses {{ remote.github.owner }} / {{ remote.github.repo }}, and git-cliff's auto-detection of those values failed transiently during task release, baking the empty result into CHANGELOG.md.

Fix

• cliff.toml: add an explicit [remote.github] section (owner = "peczenyj", repo = "structalign") so the links are deterministic and never depend on auto-detection / a remote lookup.
• CHANGELOG.md: repair the 7 already-broken links (https://github.com/// → https://github.com/peczenyj/structalign/).

Verification

git cliff --tag v0.5.2 now renders correct compare/ and tree/ URLs for all versions; grep "github.com///" CHANGELOG.md returns nothing.

🤖 Generated with Claude Code

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 84.78%. Comparing base (c4ff01d) to head (ac445c9).

Additional details and impacted files

@@           Coverage Diff           @@
##            devel      #24   +/-   ##
=======================================
  Coverage   84.78%   84.78%           
=======================================
  Files          10       10           
  Lines         677      677           
=======================================
  Hits          574      574           
  Misses         65       65           
  Partials       38       38           

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