fix(query): improve agent-facing graph answers

[forhappy]

Summary

• Expand direct incoming usage recall across callers, impact, and affected results to include source-backed references, imports, exports, and aliases while preserving exact relationship kinds.
• Keep compact Agent Orientation output bounded without deleting retained hub, suggested-query, and learned-question evidence from the full graph report.
• Expose live node degree through CompassQL direct property access and properties(n), including ORDER BY over pre-projection bindings.
• Neutralize configured Git checkout filters during isolated historical materialization instead of failing after history capability discovery succeeds.
• Add an executable compass path SOURCE TARGET next action when a directed node trail finds only a reverse/undirected connection.

Real-repository verification

Validated against the existing Zod graph (43,670 nodes and 79,097 edges):

• callers returned 24 source-anchored incoming usages for the selected ZodError class, including references and exports.
• CompassQL ranked real nodes by live degree (compile.test 3,117; schemas 2,320; schemas 1,581).
• A one-hop reverse-only node trail returned no_path, a typed direction_mismatch, and the runnable compass path fallback.
• A regenerated report rendered hubs 10/10, suggested queries 16/306, and learned questions 9/9 instead of empty sections.

Compatibility

• Raw query schemas and discovery cursor semantics are unchanged.
• callers and default impact/affected results are additively broader; exact edge kinds and bounds remain visible.
• degree is a derived, snapshot-local node property. No persisted graph schema changes.
• Historical filter neutralization preserves offline/no-hook/no-network checkout guarantees.

Verification

• cargo fmt --all -- --check
• cargo clippy --workspace --lib --bins --locked -- -D warnings
• cargo test --workspace --lib --bins --locked
• Full compass-cypher, compass-query, compass-output, and compass-history crate tests
• Focused CLI code-query, help, history, and product tests
• 500-query reviewed relevance qualification corpus
• CompassQL support corpus and product-boundary check
• Root and standalone fuzz dependency-policy checks

An optional all-targets/all-features clippy probe reaches an existing expect_err lint in crates/compass-history/tests/roundtrip.rs; the required workspace lib/bin clippy baseline is clean.