Ordering train: per-stratum tail support receipts (#652) + late-producer input DAG (#653)

[MaxGhenis]

Two ordering fixes from the first builds to reach the deep pipeline, shipped as one train because both govern late-stage execution order.

#652 — capital-gains tail: declared per-stratum support with receipts

The 1% rung cannot satisfy the tail's donor requirements in two filing-status strata (verified from real checkpoints: JOINT short 6,042, SEPARATE short 353; every stratum clears at 10% — the 10% dev run passed the tail empirically — and at full scale). Thin strata now receive named, counted insufficient_support receipts bound into the tail manifest and checkpoint identity; adequate strata attach byte-identically (regression-pinned); full-scale behavior provably unchanged (analytical counts in the report).

#653 — late-producer input dependency DAG

The 10% dev run died in adult care reading sstb_self_employment_income_before_lsr — 43,260 nonfinite inputs, all ASEC-origin native clone-0 people, because the producer ran before the post-PUF transfer filled its inputs. The #649 producer schedule proves target-producers precede their checks but never modeled producer inputs. Now: a canonical 38-producer, 71-edge dependency DAG, import-validated (cycles rejected by name), topological waves (1,1,17,14,3,2) derived not hand-ordered, byte-stable under registry iteration order, bound into checkpoint identity. A callback-aware AST audit confirms zero undeclared configured reads across all producers.

Verification

Implemented by two lanes, then one combined adversarial QA gate re-derived the stratum tables and provenance from the real build checkpoints, ran the negative-path suites, and found no production defect (report sha b79f6d39…). Battery: 5,907 passed / 0 failed; #583 guard exactly 495; ruff clean; changelog covers both issues.

Merge gate: all CI lines green plus the next 1% smoke showing the two thin-strata receipts and reaching past source completion. Real-build receipts will be posted here.

Fixes #652. Fixes #653.

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