Task 6.2 housekeeping — add BatchResultApplier to the class map per
CLAUDE.md convention. Introduced in Task 2.2 as the @Transactional
wrapper for atomic per-rule batch commits (instance writes + notification
enqueues + cursor advance).
Also refreshes GitNexus index stats auto-emitted into AGENTS.md /
CLAUDE.md (8778 -> 8893 nodes, 22647 -> 23049 edges).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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