Add manual CI activity and matrix controls

[yoshifuminakamura]

Summary

• add GitLab Manual CI controls for target project, list.csv row filters, and public activity labels
• carry execution activity into environment metadata and show activity/allocation context in the results table
• add matrix generation coverage for selecting specific benchmark rows

Tests

• bash -n scripts/matrix_generate.sh scripts/job_functions.sh scripts/collect_environment_snapshot.sh scripts/result.sh scripts/tests/test_matrix_generate_filters.sh scripts/tests/test_build_environment_snapshot.sh scripts/tests/test_result_common_json_contract.sh
• shellcheck -S error scripts/matrix_generate.sh scripts/job_functions.sh scripts/collect_environment_snapshot.sh scripts/result.sh scripts/tests/test_matrix_generate_filters.sh scripts/tests/test_build_environment_snapshot.sh scripts/tests/test_result_common_json_contract.sh
• bash scripts/tests/test_matrix_generate_filters.sh
• bash scripts/tests/test_build_environment_snapshot.sh
• bash scripts/tests/test_result_common_json_contract.sh
• bash scripts/tests/run_profile_data_shell_tests.sh common
• bash scripts/tests/run_profile_data_shell_tests.sh result-sender
• .venv/bin/python -m pytest result_server/tests -q
• .venv/bin/python -m pytest result_server/tests/test_execution_profiles.py result_server/tests/test_trigger_display.py result_server/tests/test_results_loader.py -q