Guard target selector overrides with action and shape evidence

[SonAIengine]

Summary

• preserve an LLM target when a lower-ranked candidate only has surface-term overlap
• penalize incompatible canonical actions and result shapes during deterministic selection
• interpret the final requested action/shape for directive queries while preserving terse-query behavior

Real-data validation

• replayed the five clear target-selection failures from a 1,133-tool XGEN collection
• all five now select a read/list-compatible target without BO-specific aliases or operation names

Tests

• poetry run ruff check .
• poetry run ruff format --check .
• poetry run pytest tests/ -q (1248 passed, 47 skipped)
• make quick (270 passed, 3 skipped)