Update WaaS client and API key handling

[tolgahan-arikan]

Summary

• update the generated WaaS TypeScript client from 0xsequence/waas
• switch the default WaaS API base URL to https://sandbox-api.dev.polygon-dev.technology
• send the OMS publishable key with the Api-Key header for WaaS and IndexerGateway requests
• derive the internal project ID from the publishable key in OMSClient initialization
• use IndexerGateway for exposed balance and transaction history calls
• update examples, docs, workflows, and type/test fixtures for publishable-key-only initialization

Validation

• pnpm exec vitest run tests/credentialSigner.test.ts tests/walletSigning.test.ts tests/oidcRedirectAuth.test.ts tests/walletTransactions.test.ts
• pnpm exec vitest run tests/indexerClient.test.ts
• pnpm exec vitest run tests/networks.test.ts tests/walletSession.test.ts tests/errorContracts.test.ts
• pnpm exec tsc --noEmit
• pnpm test:types
• pnpm test
• pnpm check:package-versions
• pnpm build
• pnpm build:example
• pnpm build:wagmi-example
• pnpm build:trails-actions-example
• pnpm build:node-example
• pnpm build:node-contract-deploy-example
• pnpm --filter @0xsequence/oms-wallet-wagmi-connector test
• pnpm --filter @0xsequence/oms-wallet-wagmi-connector build
• in-app browser: refreshed the Trails Actions Polygon balances panel and confirmed oms.indexer.getBalances(...) resolves to Balances updated. with no console errors

[claude]

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