Add curation ACL mode and complete graph query implementation (v0.47.0)

Curation Mode:
- Three-tier publisher classification: Trusted, Blacklisted, Unclassified
- Per-pubkey rate limiting (default 50/day) for unclassified users
- IP flood protection (default 500/day) with automatic banning
- Event kind allow-listing via categories, ranges, and custom kinds
- Query filtering hides blacklisted pubkey events (admin/owner exempt)
- Web UI for managing trusted/blacklisted pubkeys and configuration
- NIP-86 API endpoints for all curation management operations

Graph Query Extension:
- Complete reference aggregation for Badger and Neo4j backends
- E-tag graph backfill migration (v8) runs automatically on startup
- Configuration options: ORLY_GRAPH_QUERIES_ENABLED, MAX_DEPTH, etc.
- NIP-11 advertisement of graph query capabilities

Files modified:
- app/handle-nip86-curating.go: NIP-86 curation API handlers (new)
- app/web/src/CurationView.svelte: Curation management UI (new)
- app/web/src/kindCategories.js: Kind category definitions (new)
- pkg/acl/curating.go: Curating ACL implementation (new)
- pkg/database/curating-acl.go: Database layer for curation (new)
- pkg/neo4j/graph-refs.go: Neo4j ref collection (new)
- pkg/database/migrations.go: E-tag graph backfill migration
- pkg/protocol/graph/executor.go: Reference aggregation support
- app/handle-event.go: Curation config event processing
- app/handle-req.go: Blacklist filtering for queries
- docs/GRAPH_QUERIES_REMAINING_PLAN.md: Updated completion status

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

go.sum

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