feat: support credit payment in store messages

[amalcaraz]

Summary

• Add support for credit payment in STORE messages
• Update aleph-message dependency to version 1.1+ to support new payment types
• Add optional payment parameter to create_store method with ETH hold as default

Changes

API Changes

• AuthenticatedAlephClient.create_store(): Added optional payment parameter
  • Defaults to Payment(chain=Chain.ETH, type=PaymentType.hold, receiver=None) if not provided
  • Allows users to specify alternative payment methods (e.g., credit)

Dependencies

• Updated aleph-message from >=1.0.5 to >=1.1 to support new payment types

Testing

• Added test for creating instance with credit payment
• Added test for creating store message with credit payment
• Added test to verify default payment behavior (ETH hold)

Test Plan

• Unit tests pass for credit payment in store messages
• Unit tests pass for credit payment in instance messages
• Default payment behavior verified (ETH hold when not specified)
• Backwards compatibility maintained (existing code works without changes)

Backwards Compatibility

✅ Fully backwards compatible - the payment parameter is optional and defaults to the existing behavior (ETH hold).

[github-actions]

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