rigor: six complex-graph crucibles + seed the TTU campaigns

Extends the complex-graph suite to the remaining uncovered surfaces:

- complex-graph-ttl-crucible: value-TTL expiry over community/scale-free
  graphs (pinned changed_last_at writes, {now} reads, mirror freshness
  rule), mutation-with-time binary parity, snapshot round-trip preserves
  the TTL gate. Notable find: snapshot restore resets changed_last_at to
  access time (RelationSnapshotAccess.js:91), so TTL assertions compare
  each engine against its own effective write clock.
- complex-graph-overlay-crucible: partial-graph overlay over complex
  graphs. Key discovery: pre-built PartialGraphContext must be passed as
  partialGraphContext (partialGraph is a raw spec re-ingested at
  ArbiterChecks.js:15); overlay rides the direct relations a policy
  consumes (TTU-derived can_read ignores it, verified by probe).
- complex-graph-values-crucible: relational-comparator over value-carrying
  relations with pinned clocks — comparator parity, value-mutation flips
  the decision immediately, TTL expiry on the comparator denies.
- complex-graph-reachability-crucible: PLTC reachability vs ground-truth
  BFS on scale-free/community graphs — verdict parity, fast-fail
  soundness (no false positives), null-defer contract honored.
- complex-graph-batch-crucible: addRelationsBatch vs sequential build
  parity, mutation parity across both, cache-freshness after mutation.
- complex-graph-quantization-crucible: 16-bit quantization band over real
  possibility spreads, allow/deny agreement outside the band, snapshot-of-
  snapshot semantic identity.

Also seeds the two unseeded campaigns in tuple-to-userset-rule.test.js
(flagged flake ~1/15 — nondeterministic runs on a deterministic engine).

Rigor 245/245, full suite 847/785/0.

tests/rigor/tuple-to-userset-rule.test.js

@@ -92,7 +92,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('no-tuples', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 500 , artifacts: { dir: '', persist: 'never' }});
+    ).run({ effort: 500, seed: 'ttu-no-tuples', artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'no-tuples');
@@ -141,7 +141,7 @@ describe('TupleToUsersetRule evaluation (rigor)', () => {
       rigor.crucible([
         rigor.invariant('min-fusion', ({ error, errorMessage }) => !error && !errorMessage)
       ])
-    ).run({ effort: 800 , artifacts: { dir: '', persist: 'never' }});
+    ).run({ effort: 800, seed: 'ttu-min-fusion', artifacts: { dir: '', persist: 'never' }});
 
     if (process.env.TEST_DEBUG === '1') console.log(report.toTAP());
     const inv = report.crucibleVerdict?.invariants?.find(i => i.name === 'min-fusion');