chore(p0): drop never-enabled hunter tools, test-only functions and receiver delivery

Off every active line (PATHFINDER-2026-10-13/03-unified-proposal.md, cuts).
Deleted: the four hunter tools no caller enables (read_definition,
entry_points, flows, obligations) with their schemas and dispatch, the dead
mapping branch of find_refs; 20 functions whose only caller was one test
(mapping task records, compute_ranking_metrics, build_quick_hunter_prompt,
validate_evidence_transition, should_fuse, harness processors,
rank_targets_with_model, model/report slice rendering, taxonomy
hierarchical/related, config_value.verdict, taint.verdict, roles.load_roles,
features.language_of and build_for_scan, folds.leave_one_*,
features.recorded_case, search BatchExecutor and the three __main__ shims,
delivery.put_input); the receiver delivery mode of the plane. push_inputs.py
moved to benchmarks/push. memory.purge stays: the live-S3 test cleanup uses
it. Net: 2,730 lines deleted, 207 added. 473 targeted tests passed; 3,282
tests collect. breadth.toml records the removals.

Co-Authored-By: Claude Fable 5.1 <[email protected]>

src/openultrasast/cli.py

@@ -548,7 +548,7 @@ def _run_scan(path: Path, config_path: Path, mode: str, fail_on: str) -> ScanOut
         config=config,
         trace_writer=HarnessTraceWriter(run.root / "trace" / "events.jsonl", redact=config.hardening.redact_secrets),
     )
-    write_harness_config(config=config, processors=[], contract_mode="strict", path=run.root / "harness.json")
+    write_harness_config(config=config, path=run.root / "harness.json")
     runtime.start(mode=mode, target=run.target)
     policy = runtime.run_stage("policy_load", load_policy)
     ledger_path = run.target / CALIBRATION_DIR / "false_positive_learnings.json"