Fix storage module import syntax and implement operation verification for Qubic Wargame Grid - #4

This PR implements operation verification (動作確認) for the Qubic Cyber Wargame Grid system by fixing critical build issues and establishing a working test environment.

Key Changes

Fixed Storage Module Build Issues

• Resolved missing quotes in import statement that prevented Go compilation
• Unified storage package structure to eliminate circular import dependencies
• Updated dependency management for cobra and viper CLI libraries
• Storage service now builds successfully and can be executed

Improved Go Module Structure

• Fixed import paths in relay service to use correct module structure (github.com/qubic/wargame-relay/src/...)
• Generated protobuf files for worker communication protocol
• Resolved package organization issues between main and worker packages

Established Working Test Environment

• Python unit tests for determinism verification are now passing (4/4 tests)
• Test infrastructure is functional and can verify core system behavior
• Smart contracts build successfully with only minor warnings

Testing Status

The verification shows that core system components are working:

# Python determinism tests - PASSING
tests/unit/test_determinism.py::TestDeterminism::test_attack_worker_determinism PASSED
tests/unit/test_determinism.py::TestDeterminism::test_defense_worker_determinism PASSED
tests/unit/test_determinism.py::TestDeterminism::test_different_seeds_produce_different_outputs PASSED
tests/unit/test_determinism.py::TestSeedHandling::test_seed_format_validation PASSED

# Storage service builds successfully
$ cd storage && go build -o bin/wargame-storage ./src
# Success - no errors

# Smart contracts compile
$ cd contracts/wargame && make
# Success with only minor unused parameter warnings

Remaining Work

While the core verification is successful, there are still some gRPC version compatibility issues in the relay service that need to be addressed in follow-up work. The system architecture is sound and the fundamental functionality for deterministic execution testing is working correctly.

Fixes #3.

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