Rename RunWitness to RunTranslator

[xmap]

Summary

• RunWitness borrowed its name from the modeling axis it implements (ConductMode.WITNESSED, "who drove the act") rather than from what the agent itself does: translate an external tool's own vocabulary (TomoScan's free-text ScanStatus values) into CORA's canonical CapturePhase, then issue the matching Run command.
• Per R5's actual test (name the agent for its own verb, not a category its output belongs to), RunTranslator is the correct name, and it stops reading as a fifth member of the unrelated Watcher family in the fleet roster.
• Full rename: new seeded identity (AgentName is genesis-only immutable, so this is a fresh definition), the implementing runtime module/class (_run_witness.py -> _run_translator.py, RunWitnessRecorder -> RunTranslator), every run_witness.* log event -> run_translator.*, and every docstring/comment cross-reference that pointed at the old names.
• RunWitness itself (seed_run_witness.py, RUN_WITNESS_AGENT_ID) stays source-tracked forever per its own FOREVER-STABLE rule, retired the same way the RunDebriefer/CautionDrafter legacy pair was.
• Deliberately unchanged: the run_witness_enabled / run_witness_recording_enabled Settings fields and their env vars, since renaming those would silently change what a live deployment's existing configuration means.

Test plan

• pytest tests/unit (52,019 passed)
• pytest tests/architecture (fitness functions green)
• pytest tests/integration (postgres, 1370 passed)
• pytest tests/e2e (8 passed)
• pyright clean
• ruff check / ruff format --check clean
• CI green
• Live 2-BM migration after merge (seed RunTranslator, deprecate old RunWitness, verify no auth-mismatch warnings)

🤖 Generated with Claude Code

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Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
apps/api/src/cora/agent
__init__.py
_seeded_fleet.py
seed_capture_progress_feeder.py
seed_run_translator.py
apps/api/src/cora/api
_capture_scan_ingestor.py
_run_translator.py					935-939, 981, 1043, 1074, 1136, 1138, 1186, 1450, 1462-1464, 1469
_status_push.py
in_process_grants.py
main.py					1382-1394
pilot_seed.py
apps/api/src/cora/infrastructure
config.py
apps/api/src/cora/run
wire.py
apps/api/src/cora/run/aggregates/run
state.py
apps/api/src/cora/run/features/list_runs
query.py
apps/api/src/cora/run/features/record_witnessed_run
handler.py
apps/api/src/cora/run/features/record_witnessed_run_outcome
decider.py
Project Total

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