Add exact centre-entry, rational-code, and retained-reader services

research/centre-code-services/CHECKS.json

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+{
+  "capture_word": "lanes/native-escape-20261017/owner-review/capture-word-review-20261020/check_review.py",
+  "centre_constants": "lanes/native-escape-20261017/owner-review/centre-constants-review-20261020/check_review.py",
+  "clique_grid": "lanes/native-escape-20261017/owner-review/clique-code-grid-review-20261020/check_review.py",
+  "fixed_reader_services": "lanes/bridge-review-20261017/fixed-reader-service-review-20261020/check_service.py",
+  "moving_entry": "lanes/bridge-review-20261017/moving-code-review-20261020/check_moving_code.py",
+  "phase_inverse": "lanes/bridge-review-20261017/rank30-phase-section-review-20261020/check_phase_section.py",
+  "unnormalised_code": "lanes/native-escape-20261017/owner-review/unnormalised-code-review-20261020/check_review.py"
+}

research/centre-code-services/NOTICE.md

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+# Notice
+
+The new campaign and wrapper contributions use the repository's Apache-2.0
+license. A copy is in [notices/LICENSE](notices/LICENSE). Frozen source
+text and existing attribution are unchanged. Substantial OpenAI Codex
+assistance was used for constructions, proofs, independent agent checks,
+and this publication package.
+
+The retained common-grid source is
+[stopped-product-complex.tex](notices/stopped-product-complex.tex), from
+CrocSwap/integer-mult-bounds at `bce54fb3f895cbe5cd4c0eb477c3afeed100190f`.
+Its Git blob is `4a9037137cd3158dbeca6d9e3b1881a599ebfcb5`; its SHA256 is
+`4738089103a4b263b3b0ef458f5ef35519c696f1ea871ae79e508d3720f5870a`.
+The [upstream notice](notices/UPSTREAM-NOTICE) credits icekylinx for the
+stopped product-ring construction and exact denominator grid, with GPT-6
+Astra and Codex assistance. The rational services retain that method as
+a dependency. Their new local contributions are the actual code words,
+image tests, and conditional matching-type extension.
+
+The actual native core descends from
+[PR #3133](https://github.com/CrocSwap/integer-mult-bounds/pull/3133), at
+`51eb9c4ee9e4722010d308aa3309e039d3940cc2`. The base and extra provider
+words descend from
+[PR #3148](https://github.com/CrocSwap/integer-mult-bounds/pull/3148), at
+`f2927a4b8afcf0701a6b945e14f30de1d94f5176`. The retained
+[notice](notices/PR3133-NOTICE) and [credit record](notices/PR3133-CREDITS.md)
+credit dcharb78 for the coupled folds and preserve the earlier lineage.
+The exact PR #3148 README credits Jeremy Diviney for the packing exchange,
+integration, and verification. These inherited cores are not new work here.
+
+The native recipe lineage uses
+[PR #2588](https://github.com/CrocSwap/integer-mult-bounds/pull/2588), at
+`8cd9dc88e24f062e2ca2fa7f4844a3d3319381fb`. Its
+[notice](notices/PR2588-NOTICE) credits Cinna Davis for the dirty-borrowing
+method, Rohan Arun for the new package work, and Jeremy Kothe and the
+named predecessors for retained methods. For [PR #2226](https://github.com/CrocSwap/integer-mult-bounds/pull/2226),
+the exact referenced [dependency notice](notices/NOTICE-PR2226.md) and
+[vendored notice](notices/PR2226-NOTICE.md) are also retained.
+The [exact notice readback](evidence/PR2226-PRIOR-SOURCE-READBACK.json) is
+retained unchanged as prior-source evidence. Its package-context hashes
+refer to the encoder notice addendum, not to this services package.
+No compiler author is inferred from a submitter account.
+
+The [source readback](evidence/NATIVE-SOURCE-VERIFICATION.json) and
+[provider notice readback](evidence/PROVIDER-NOTICE-VERIFICATION.json)
+record the immutable GitHub source and notice checks. The package
+manifest pins all retained notices. The historical freeze text and
+original reviewer status are preserved as evidence.