fix: bug fixes and optimizations

[cusma]

This PR fixes the following bugs:

• Too early ASA params validation on create metadata;
• Missing ASA ID key in extra payload checks;
• Missing MBR payment receiver in replace metadata larger;
• Missing Zero Address ASA Manager in immutable getter;

And enhances the following aspects:

• More strict validation of page index in get page hash;
• Optimize idempotent calls to avoid extra opcodes;
• Correctly handle empty metadata (both get and page hash).

[Copilot]

Pull request overview

This PR fixes several bugs and optimizes the ASA metadata registry contract to reduce opcode costs and improve validation:

• Adds stricter validation for extra payload transactions and page indices
• Optimizes idempotent operations to skip unnecessary work
• Fixes validation timing issues in metadata creation
• Enhances immutability detection to include zero-address managers

Reviewed changes

Copilot reviewed 3 out of 7 changed files in this pull request and generated 3 comments.

File	Description
tests/test_arc89_is_metadata_immutable.py	Adds test for zero-address manager immutability check (currently skipped pending algokit-utils fix)
smart_contracts/asa_metadata_registry/contract.py	Main contract changes: refactors flag checking, adds idempotency optimizations, fixes validation order, adds zero-address manager check, and improves page index validation
smart_contracts/asa_metadata_registry/constants.py	Adds constants for ARC-4 argument indexes to improve code clarity
smart_contracts/artifacts/asa_metadata_registry/AsaMetadataRegistry.approval.teal	Generated TEAL reflecting all Python contract changes

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 9 changed files in this pull request and generated 4 comments.

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