chore(changelog): strip internal-reference Tracking trailers [skip-runtime-e2e] (#183)

## Skip-runtime-e2e justification

CHANGELOG-only edit — pure release-notes hygiene, no code change, no
runtime contract touched.

## Summary

Removes the `### Tracking` trailers (with internal issue links) that
the v9.0.0 release-notes hygiene audit added to its touched sections.
Internal-team references are not customer-facing release-notes content
and were carried over from the original audit by mistake.

No prose body changes; only the trailing Tracking sections are
removed. The section title, summary, Added/Changed/Fixed bullets, and
any URLs that point to customer-accessible resources (e.g. the public
privacy page) are unchanged.

Signed-off-by: Saurabh Jain <saurabh.jain@getaxonflow.com>

Author: saurabhjain1592

CHANGELOG.md

@@ -62,12 +62,6 @@ when no `clientId` is configured.
  legacy SDK builds keep working unchanged.
 - No SDK config changes. No removed fields. No changed defaults.
 
-### Tracking
-
-- [#2230](https://github.com/getaxonflow/axonflow-enterprise/issues/2230)
-- [#2275](https://github.com/getaxonflow/axonflow-enterprise/issues/2275)
-- [#2277](https://github.com/getaxonflow/axonflow-enterprise/issues/2277)
-
 ## [8.0.0] - 2026-05-09 — Decision History API + policy_version recorded on every decision + telemetry simplification
 
 **Major release.** The headline feature is the new decision-history client