chore(release): v2.2.0 — Retroactive Salience + Tool Consolidation

Version bump 2.1.27 -> 2.2.0 across workspace crates + npm packages.

v2.2.0 = three coherent value streams:
- Retroactive Salience Backfill (Cai 2024 Nature) — memory with hindsight
- MCP Tool Consolidation (34 -> 13 advertised tools)
- deep_reference engine upgrades (F32 / RRF / claim-contradiction / band-gate)
  + recall/compose CLI
- security & correctness audit-swarm fixes

The Black Box / trace-receipt / cloud-sync / launch-UI bundle (PR #98) is a
separate coupled feature stream and ships as its own follow-up release.

Gates: 1550 tests pass, clippy -D warnings clean, dashboard check + build clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

crates/vestige-core/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "vestige-core"
-version = "2.1.27"
+version = "2.2.0"
 edition = "2024"
 rust-version = "1.91"
 authors = ["Vestige Team"]

crates/vestige-mcp/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "vestige-mcp"
-version = "2.1.27"
+version = "2.2.0"
 edition = "2024"
 description = "Cognitive memory MCP server for AI agents - FSRS-6, spreading activation, synaptic tagging, 3D dashboard, and 130 years of memory research"
 authors = ["samvallad33"]
@@ -60,7 +60,7 @@ path = "src/bin/cli.rs"
 # Only `bundled-sqlite` is always on. `embeddings` and `vector-search` are
 # toggled via vestige-mcp's own feature flags below so `--no-default-features`
 # actually works (previously hardcoded here, which silently defeated the flag).
-vestige-core = { version = "2.1.27", path = "../vestige-core", default-features = false, features = ["bundled-sqlite"] }
+vestige-core = { version = "2.2.0", path = "../vestige-core", default-features = false, features = ["bundled-sqlite"] }
 
 # ============================================================================
 # MCP Server Dependencies