chore(release): v8.2.0 platform cross-ref + terminology

[saurabhjain1592]

Summary

• Add platform >= 8.1.0 requirement to v8.2.0 Compatibility section
• Replace "operator" with compliant wording in unreleased v8.1.0 entry (2 occurrences)

Part of the cross-repo release-prep sweep (getaxonflow/axonflow-enterprise#2428).

Manifest verification (no changes needed)

File	Expected	Actual
pom.xml version	8.2.0	8.2.0

CHANGELOG diff

 ### Compatibility

 No breaking changes. New types are additive in
 ...
+Requires AxonFlow platform >= 8.1.0 for `notify_url` webhook delivery
+and `Idempotency-Key` request deduplication.

 Cross-SDK parity sweep: getaxonflow/axonflow-enterprise#2421.

 ## [8.1.0] ...
 ...
-  1. The `ORG_ID` env var when set (the operator's explicit configuration
+  1. The `ORG_ID` env var when set (the explicit configuration
      on self-hosted deployments ...
 ...
- addition — the operator-supplied `ORG_ID` on self-hosted is not
+ addition — the configured `ORG_ID` on self-hosted deployments is not

Checklist

• CHANGELOG entry date: [8.2.0] - 2026-05-23 (pre-existing)
• Platform cross-reference added
• No "operator" in any entry
• No AI attribution
• DCO sign-off on commit