- Extract FakeEmbeddings, RelevanceScoringStrategy, AdaptiveContextSelector,
ContextFusionStrategy, and _pack_budget from features/steps/ into new
features/mocks/advanced_context_strategies_mocks.py per mock-placement rules
- Remove sys.path manipulation from robot/helper_advanced_context_strategies.py;
import directly from features.mocks instead of features/steps
- Add None guard before selected.assemble() in step_assemble_context_query
- Add explicit ValueError for unknown strategy types in step_load_yaml_strategy
and load_strategy_from_yaml_impl
ISSUES CLOSED: #7574
