feat: OptimizerV3 with direct 2D staking-to-LP parameter mapping

Core protocol changes for launch readiness:

- OptimizerV3: binary bear/bull mapping from (staking%, avgTax) — avoids
  exploitable AW 30-90 kill zone. Bear: AS=30%, AW=100, CI=0, DD=0.3e18.
  Bull: AS=100%, AW=20, CI=0, DD=1e18. UUPS upgradeable with __gap[48].
- Directional VWAP: only records prices on ETH inflow (buys), preventing
  sell-side dilution of price memory
- Floor formula: unified max(scarcity, mirror, clamp) — VWAP mirror uses
  distance from adjusted VWAP as floor distance, no branching
- PriceOracle (M-1 fix): correct fallback TWAP divisor (60000s, not 300s)
- Access control (M-2 fix): deployer-only guard on one-time setters
- Recenter rate limit (M-3 fix): 60-second cooldown for open recenters
- Safe fallback params: recenter() optimizer-failure defaults changed from
  exploitable CI=50%/AW=50 to safe bear-mode CI=0/AW=100
- Recentered event for monitoring and indexing
- VERSION bump to 2, kraiken-lib COMPATIBLE_CONTRACT_VERSIONS updated

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

kraiken-lib/src/version.ts

@@ -9,7 +9,7 @@
  * Current version this library is built for.
  * Should match the deployed Kraiken contract VERSION.
  */
-export const KRAIKEN_LIB_VERSION = 1;
+export const KRAIKEN_LIB_VERSION = 2;
 
 /**
  * Singleton ID used for stack metadata rows across services.
@@ -24,8 +24,9 @@ export const STACK_META_ID = 'stack-meta';
  *
  * Version History:
  * - v1: Initial deployment (30-tier TAX_RATES, index-based staking)
+ * - v2: OptimizerV3, VWAP mirror floor, directional VWAP recording
  */
-export const COMPATIBLE_CONTRACT_VERSIONS = [1];
+export const COMPATIBLE_CONTRACT_VERSIONS = [1, 2];
 
 /**
  * Validates if a contract version is compatible with this library.