Get a taxonomy analytics run

A persisted taxonomy step-analytics run.

Every time a user runs a transitions or paths analysis, the request parameters and the computed result are stored (upserted, de-duplicated by a hash of the normalized params) so the run can be listed, reviewed, and re-run later. Re-running the same parameters updates the existing record and increments run_count rather than creating a duplicate.

Attributes: run_id: Stable identifier for the run (taxrun_<token>). taxonomy_id: Taxonomy the analytics were computed against. collection_id: Collection the analytics were computed against. analysis_type: transitions or paths. params: The request parameters used (exclude_none dump of the request body). Enough to reconstruct and re-run the analysis. params_hash: SHA-256 of the normalized params (plus analysis_type and collection_id) — the upsert de-duplication key. from_step: Convenience copy of the transition's starting step. to_step: Convenience copy of the transition's ending step. name: Optional user-provided label for the run. result: The computed analytics result (model_dump of the response). status: Run status; completed on success. error_message: Populated only when a run failed. run_count: Number of times these exact params have been executed. namespace_id: Tenant namespace (auto-populated by the provider). internal_id: Tenant/org id (auto-populated by the provider). created_at: When the run was first persisted. updated_at: When the run was last (re-)executed.