refactor(query): deepen command/dispatch seams and resolve coderabbit findings
* refactor(query): deepen command definition seam and fold fallback mapping cleanup
* refactor(query): add shared dispatch formatting module seam
* fix(query): restore QueryResult type import in dispatch deps
* test/query: align raw-output policy and definition normalization contracts
* refactor(query): deepen diagnosis, invariant report, and error taxonomy seams
* refactor(query): deepen dispatch plan, fallback bridge, policy snapshot, and hints seams
* refactor(query): deepen validation, fallback policy, capability, and result builder seams
* refactor(query): deepen resolution strategy, output classifier, observability, and policy-capability seams
* refactor(query): finalize deep strategy/classifier/observability/capability seams
* test/query: address coderabbit inline and out-of-diff dispatch nits
* fix(query): address remaining coderabbit input-validation and bridge stderr threads
* fix(query): address remaining coderabbit dispatch and strategy/output nits
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