Fix missing ARC_PATH import in adapter_test.py

[Copilot]

arc/job/adapter_test.py references ARC_PATH on line 211 but was only importing ARC_TESTING_PATH, causing CI test failures.

Changes:

• Added ARC_PATH to the import statement from arc.common

# Before
from arc.common import ARC_TESTING_PATH

# After  
from arc.common import ARC_PATH, ARC_TESTING_PATH

Original prompt

Pull Request: #807

Fix the error in the ci where it was missing the import of ARC_PATH

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[Copilot]

Pull request overview

Fixes a CI/unit-test failure in ARC’s job adapter tests by importing a missing path constant used to locate a test fixture.

Changes:

• Update arc/job/adapter_test.py to import ARC_PATH alongside ARC_TESTING_PATH from arc.common.

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