Fix TypeScript build errors

FIXES_SUMMARY.md

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+# DBIS Core Fixes Summary ✅
+
+## Completed Fixes
+
+### 1. Prisma Schema Validation ✅
+- **Status**: All validation errors fixed
+- **Initial Errors**: 27+ validation errors
+- **Final Status**: 0 errors - Schema validates successfully
+- **Fixes Applied**:
+  - Fixed `@map` → `@@map` syntax
+  - Removed duplicate models
+  - Fixed missing opposite relation fields
+  - Added `@unique` constraints where needed
+  - Removed conflicting relations
+
+### 2. JavaScript Reserved Word Error ✅
+- **File**: `bond-pricing.service.ts`
+- **Issue**: `yield` is a reserved word in JavaScript strict mode
+- **Error**: `SyntaxError: Unexpected strict mode reserved word`
+- **Fix**: Renamed variable `yield` → `bondYield` / `calculatedYield`
+- **Status**: Fixed
+
+### 3. TypeScript Syntax Errors ✅
+- **Files Fixed**:
+  - `sandbox.service.ts` - Missing `>` in Promise return types
+  - `supervision-engine.service.ts` - Missing closing braces in OR arrays
+  - `gru-reconciliation.service.ts` - Missing `>` in Promise return type
+- **Status**: All syntax errors fixed
+
+## Remaining Issues
+
+### TypeScript Type Errors (Non-Critical)
+The build still fails due to TypeScript type-checking errors:
+
+1. **IdentityType Type Mismatch**
+   - Location: Multiple files
+   - Issue: String literals not matching `IdentityType` enum
+   - Impact: Compile-time error, not runtime
+
+2. **UI Components in API Build**
+   - Location: `src/ui/components/design-system/*`
+   - Issue: `window` object not available in Node.js
+   - Impact: These files shouldn't be compiled for API
+   - Solution: Exclude UI components from API build or add proper type guards
+
+3. **Unused Variables**
+   - Type: TS6133 warnings
+   - Impact: Non-blocking, but should be cleaned up
+
+## Next Steps
+
+1. **Option A**: Fix TypeScript type errors (will require type definitions)
+2. **Option B**: Configure TypeScript to exclude UI components from API build
+3. **Option C**: Use `tsc --noEmit false` to generate JS despite type errors (not recommended)
+
+## Files Modified
+
+1. `dbis_core/prisma/schema.prisma` - Prisma schema fixes
+2. `dbis_core/src/core/monetary/gru/bond-pricing.service.ts` - Reserved word fix
+3. `dbis_core/src/core/compliance/regtech/sandbox.service.ts` - Promise type fix
+4. `dbis_core/src/core/compliance/regtech/supervision-engine.service.ts` - Array syntax fix
+5. `dbis_core/src/core/monetary/gru/gru-reconciliation.service.ts` - Promise type fix
+
+## Current Status
+
+- ✅ Prisma schema: VALID (0 errors)
+- ✅ JavaScript syntax: FIXED
+- ✅ TypeScript syntax: FIXED
+- ⚠️ TypeScript types: REMAINING (blocking build)
+