chore(shared): add shared package README and environment example

- Add comprehensive README for shared package
- Add .env.example for database configuration
- Add index.ts exports for shared modules
- Add pnpm-lock.yaml for dependency locking

Completes shared package documentation and configuration.

Author: 2075

packages/identity-service/src/routes/index.ts

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+/**
+ * Route exports
+ */
+
+export { healthRouter } from './health';
+export { createIdentityRouter } from './identity';
+

packages/shared/.env.example

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+# Database
+DATABASE_URL="postgresql://battlepass:password@localhost:5432/battlepass?schema=public"

packages/shared/README.md

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+# @battlepass/shared
+
+Shared types, events, utilities, and database client for the Battlepass system.
+
+## Usage
+
+### Types
+```typescript
+import { Identity, Platform, Quest, Source, ActivityType } from '@battlepass/shared';
+```
+
+### Events
+```typescript
+import { IdentityCreatedEvent, QuestCompletedEvent } from '@battlepass/shared';
+```
+
+### Database
+```typescript
+import { prisma } from '@battlepass/shared';
+
+// Use Prisma client
+const identity = await prisma.identity.findUnique({
+  where: { sbtAddress: '0x...' }
+});
+```
+
+### Utilities
+```typescript
+import { isValidAddress, formatAddress } from '@battlepass/shared';
+```
+
+## Database
+
+### Prisma Setup
+
+1. Set up environment variable:
+```bash
+DATABASE_URL="postgresql://user:password@localhost:5432/battlepass"
+```
+
+2. Generate Prisma Client:
+```bash
+pnpm db:generate
+```
+
+3. Run migrations:
+```bash
+pnpm db:migrate
+```
+
+4. Open Prisma Studio:
+```bash
+pnpm db:studio
+```
+
+## Structure
+
+- `types/` - TypeScript type definitions
+- `events/` - Event schemas and types
+- `utils/` - Shared utility functions
+- `db/` - Prisma client export
+- `prisma/` - Prisma schema and migrations

packages/shared/src/index.d.ts

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+export * from './types';
+export * from './events';
+export * from './utils';
+export * from './db';
+export * from './logger';
+export * from './rabbitmq';
+//# sourceMappingURL=index.d.ts.map