forgeproof(#9): Add priority validation to Task

[ryanjmichie-git]

Closes #9

ForgeProof Provenance — Issue #9

Status: PASS
Bundle: .forgeproof/issue-9.rpack
Root Digest: 14f553a4237e7d18...

Requirement Coverage

ID	Requirement	Status	Tests
REQ-1	Each Task has a priority attribute with allowed values low, medium, high; default is medium	covered	test_priority_defaults_to_medium, test_priority_accepts_all_allowed_values, test_priority_accepts_allowed_strings
REQ-2	Creating or setting a Task with any other priority value raises ValueError	covered	test_invalid_priority_string_at_creation_raises, test_invalid_priority_type_at_creation_raises, test_invalid_priority_on_assignment_raises, test_valid_priority_on_assignment, test_invalid_priority_in_from_dict_raises
REQ-3	TaskStore has a filter_by_priority(priority) method returning tasks matching the given priority	covered	test_filter_by_priority_returns_matches, test_filter_by_priority_no_match
REQ-4	Existing behavior (creation, completion, serialization) is unchanged for tasks that never set a priority	covered	test_untouched_priority_creation_and_completion, test_untouched_priority_serialization_round_trip

Evaluation

• Tests passed: 44
• Tests failed: 0
• Lint errors: 0
• Coverage: 100%

Artifacts

• src/task.py (modify)
• tests/test_priority.py (create)

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Verify: /forgeproof:verify .forgeproof/issue-9.rpack

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