Merge origin/main (v0.6.2, cluster Stage 2B) into ragnorc/scrutinize-rfc-002

Conflict resolutions:
- cli/main.rs: keep the omnigraph_api_types import (branch extraction) and
  add main's omnigraph_cluster import; test-import list takes the branch's
  ResolvedCliGraph/is_remote_uri additions
- Cargo manifests: union of deps — branch's config/queries/api-types crates
  plus main's cluster crate; all versions unified at 0.6.2 (new crates bumped
  from 0.6.1)
- cli/Cargo.toml: omnigraph-server dep stays dropped (branch decision; CLI
  references it only in comments and the test harness binary spawn)
- AGENTS.md: 0.6.2 + union crate list
- cli-reference.md: branch's --graph/layered-config sections + main's
  cluster/repair rows
- Cargo.lock regenerated

cargo test --workspace --locked passes; scripts/check-agents-md.sh passes.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Cargo.toml

@@ -4,6 +4,7 @@ members = [
     "crates/omnigraph-compiler",
     "crates/omnigraph",
     "crates/omnigraph-cli",
+    "crates/omnigraph-cluster",
     "crates/omnigraph-policy",
     "crates/omnigraph-server",
     "crates/omnigraph-config",