Fix TypeScript build errors

FIXES_SESSION_5.md

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+# Type Error Fixes - Session 5
+
+## ✅ Completed Fixes
+
+### CBDC Services - Additional Fixes
+1. **cbdc.service.ts** ✅
+   - Fixed null handling: Changed `null` to `Prisma.JsonNull` for metadata when reason is not provided
+
+2. **cbdc-wallet.service.ts** ✅
+   - Fixed tieredAccess: Added `as Prisma.InputJsonValue` casting
+
+3. **face-behavioral.service.ts** ✅
+   - Fixed engineConfig: Added `as Prisma.InputJsonValue` casting (2 instances)
+
+4. **cbdc-velocity-control.service.ts** ✅
+   - Fixed timeBasedThrottle: Changed null handling to use `Prisma.JsonNull`
+
+5. **zk-validation services** ✅
+   - Fixed proofData: Changed from `InputJsonValue` to `string` (correct type)
+   - Fixed publicInputs: Changed from `as unknown as Record<string, unknown>` to `as Prisma.InputJsonValue` (3 files)
+
+### Compliance ARI Services - Additional Fixes
+1. **ari-cortex.service.ts** ✅
+   - Fixed policyRules: Changed from `as unknown as Record<string, unknown>` to `as Prisma.InputJsonValue`
+
+2. **ari-decisioning.service.ts** ✅
+   - Fixed decisionData and policyRules: Changed from `as unknown as Record<string, unknown>` to `as Prisma.InputJsonValue` (multiple instances)
+
+3. **ari-reflex.service.ts** ✅
+   - Fixed policyRules and newRules: Changed from `as unknown as Record<string, unknown>` to `as Prisma.InputJsonValue` (multiple instances)
+
+## Key Fixes
+
+### Null Handling Pattern
+- For nullable JSON fields that can be null, use `Prisma.JsonNull` instead of `null`
+- Pattern: `value ? (value as Prisma.InputJsonValue) : Prisma.JsonNull`
+
+### String vs JsonValue
+- proofData fields should be `string`, not `Prisma.InputJsonValue`
+- Pattern: `proofData: proofData as string`
+
+### Cleaner Type Casting
+- Replaced `as unknown as Record<string, unknown>` with proper `as Prisma.InputJsonValue`
+- This is cleaner and more type-safe
+
+## Progress
+
+- Fixed additional ~15+ JsonValue errors in files we previously worked on
+- Improved type safety by using proper Prisma types instead of workarounds
+- Total JsonValue fixes so far: ~55+ instances across ~30 files
+