bench: 5R battery — closes ticket #000021 (15-sub-battery suite complete)

Phase 2 of #000021. React/Rearrange/Restore/Replicate/Resonate over
the workspace surface — selfmodel_records (#000014) + memory_records
(#000017), both landed earlier today. Closes the gap that gated 5R
since the substrate work shipped.

Sub-battery semantics (per SQD whitepaper §9.3 + ticket #000021 §4.2):

- React: incorporate new fact/constraint. Workspace = (snapshot_t0,
  snapshot_t1, expected_delta). Pass = added_facts present + removed_facts
  absent in t+1.
- Rearrange: restructure without semantic shift. Re-canonicalize
  different surface forms through a named π*; pass = bytes match
  expected_equivalent flag. Tests the order-invariance contracts in
  SelfModel (capability_claim_hashes sorted) and Memory (branches
  sorted by branch_id).
- Restore: retrieve prior fact. Workspace = (history[], current_facts[]).
  Pass = fact in current OR any historical snapshot.
- Replicate: independent canonical encodings via π*. Same input run
  N times must yield byte-equal output. Tests determinism contract.
- Resonate: variance across N runs. Deterministic π*'s yield
  distinct=1; expected_max_distinct=1 enforces zero-variance contract.

Surface:

- bench/batteries/b_5r.py (5 deterministic runners; no LLM-as-judge)
- bench/fixtures/5r/{react,rearrange,restore,replicate,resonate}-v1.jsonl
  (30 each = 150 new fixtures)
- runner.py registers 5r in _BATTERIES + _DEFAULT_FIXTURES
- Makefile: bench-5r + bench-suite (5S+5T+5F+5R aggregate)

Final tally:
  5S  syntax/semantics/syllogism/synthesis/semiotics       108
  5T  transfer/transfer-learning/triangulation/...          154
  5F  function/finetuning/falsification/...                  50
  5R  react/rearrange/restore/replicate/resonate            150
  TOTAL: 462 fixtures across 21 sub-batteries — 100% pass.

Tests: 6 new in tests/test_bench_batteries.py + adjustment to
test_session_integration.py for the 312→462 count + 5R sub-battery
presence assertion. Full suite: 1192 passed, 36 skipped.

Closes #000021. Phase 3 (external-corpus expansion) remains open
under the ticket but does not gate closure — the complete
Dav1DPrometheus surface is now executable infrastructure.

Makefile

@@ -266,9 +266,18 @@ bench-5f: bootstrap ## 5F battery (Function+Finetuning+Falsification+Formulate+F
 	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5f --sub formulate      --fixtures bench/fixtures/5f/formulate-v1.jsonl
 	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5f --sub feedback-loop  --fixtures bench/fixtures/5f/feedback-loop-v1.jsonl
 
+bench-5r: bootstrap ## 5R battery (React+Rearrange+Restore+Replicate+Resonate)
+	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5r --sub react      --fixtures bench/fixtures/5r/react-v1.jsonl
+	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5r --sub rearrange  --fixtures bench/fixtures/5r/rearrange-v1.jsonl
+	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5r --sub restore    --fixtures bench/fixtures/5r/restore-v1.jsonl
+	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5r --sub replicate  --fixtures bench/fixtures/5r/replicate-v1.jsonl
+	PYTHONUNBUFFERED=1 $(PY) -m bench.batteries.runner --battery 5r --sub resonate   --fixtures bench/fixtures/5r/resonate-v1.jsonl
+
 bench-5s5t: bench-5s bench-5t ## 5S + 5T (Phase-1b vocabulary)
 
-bench-5s5t5f: bench-5s bench-5t bench-5f ## complete Dav1DPrometheus suite (5S + 5T + 5F)
+bench-5s5t5f: bench-5s bench-5t bench-5f ## 5S + 5T + 5F (operational triad)
+
+bench-suite: bench-5s bench-5t bench-5f bench-5r ## complete Dav1DPrometheus suite (5S + 5T + 5F + 5R)
 
 
 verify-shards: bootstrap ## cross-shard Merkle round-trip on a random sample