✨ S3UTILS-230 implement CRR multi-site V2 replication format

[DarkIsDude]

Summary

• Add V2 replication format support to ReplicationStatusUpdater, implementing the CRR to Multiple Sites design
• V2 configs (rules with Filter, Priority, or Destination.Account) route through a new _markObjectPendingV2 path that writes per-backend destination/role and removes legacy top-level storageClass/storageType/destination
• V1 configs (comma-separated StorageClass or no V2 indicators) retain existing behavior unchanged

Changes

CRR/ReplicationStatusUpdater.js

• _isLegacyFormat() — detects V1 vs V2 bucket config format
• _getMatchingRules() — prefix-matches object key against rules, deduplicates by site (highest priority wins)
• _deriveRuleRole() — substitutes Destination.Account into the role ARN to produce per-rule IAM role
• _computeTopLevelStatus() — aggregates backend statuses: FAILED > PROCESSING > COMPLETED
• _markObjectPendingV2() — V2 metadata writer (per-backend destination/role, no legacy top-level fields)
• _markPending() — routes to V1 or V2 path based on bucket config format

tests/utils/crr.js — V2 bucket replication config fixture

tests/unit/CRR/ReplicationStatusUpdater.js — 7 new V2 test cases (single match, dual-rule prefix overlap, no-match skip, SITE_NAME filter, all-up-to-date skip, PROCESSING aggregate status, forceUsingConfiguration)

Test plan

• All 406 unit tests pass (yarn test:unit)
• Lint clean (yarn lint)
• V2 metadata written with per-backend destination/role and no legacy top-level fields
• V1 configs produce identical output to before this change

Issue: S3UTILS-230

[codecov]

Codecov Report

❌ Patch coverage is 90.67797% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 45.65%. Comparing base (eb9592d) to head (f9fca0c).

Files with missing lines	Patch %	Lines
CRR/ReplicationStatusUpdater.js	90.67%	11 Missing ⚠️

Additional details and impacted files

@@                Coverage Diff                @@
##           development/1     #396      +/-   ##
=================================================
+ Coverage          44.90%   45.65%   +0.75%     
=================================================
  Files                 88       88              
  Lines               6456     6566     +110     
  Branches            1352     1378      +26     
=================================================
+ Hits                2899     2998      +99     
- Misses              3511     3522      +11     
  Partials              46       46              

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[bert-e]

Waiting for approval

The following approvals are needed before I can proceed with the merge:

• the author

• 2 peers