Remove Graphify from Compass production and CI

[forhappy]

What changed

• remove the hidden Graphify CLI/watch/MCP compatibility frontend and all run_graphify_watch paths
• hard-cut runtime configuration to Compass-owned names: COMPASS_*, .compassignore, .compass/, merge.compass.*, and compass://...
• remove the compass-parity crate, Python/Graphify oracle tests, compatibility manifest, and Graphify-dependent qualification phases
• remove obsolete assistant assets that still instructed users to run Graphify; retain only the canonical Compass skill/integration assets
• replace selected differential checks with direct native Compass CLI/artifact assertions
• make CI, hardening, packaging, and coverage independent of any Graphify checkout
• add scripts/check_product_boundary.sh to prevent production or automation dependencies from returning
• update compatibility, migration, architecture, performance, and contributor documentation for the independent product contract

Why

Compass and Graphify are now separate products, but the repository still carried an internal Graphify frontend and made the Python Graphify repository part of normal CI. That preserved two product identities, duplicated configuration and rendering paths, left obsolete assistant instructions in-tree, and made Compass verification depend on an external product.

This is an intentional hard cutover. Graphify is retained only as project-lineage attribution and in migration/non-interference tests. It is not a Compass runtime, build, test, or CI dependency.

User impact

• only compass is supported
• existing Graphify output/configuration is not loaded as fallback state
• users must build fresh compass-out/ artifacts and use Compass-owned configuration names
• MCP clients must use server compass and compass://... resources

Verification

• cargo test --workspace --all-targets --locked — passed (only explicitly ignored network/model acceptance tests skipped)
• cargo clippy --workspace --all-targets --locked -- -D warnings — passed
• cargo fmt --all -- --check — passed
• sh scripts/check_product_boundary.sh — passed
• git diff --check — passed
• rebuilt target/debug/compass; binary string audit found no graphify, GRAPHIFY_*, .graphify, or graphify://
• cargo tree -p compass-cli --locked found no Graphify, parity, or Python dependency
• graphify update . completed as required by repository contributor instructions; generated graph artifacts were not committed