modify tolerance policy

docs/linear-static-3d-euler-beam/reference-comparison.md

@@ -10,11 +10,45 @@
 - source_io_definition: `docs/linear-static-3d-euler-beam/io.md`
 - source_implementation_plan: `docs/linear-static-3d-euler-beam/implementation-plan.md`
 - source_implementation_report: `docs/linear-static-3d-euler-beam/implementation-report.md`
-- status: `pass-for-physics-evaluation`
+- historical_status: `pass-for-physics-evaluation`
+- current_status: `pass-for-physics-evaluation`
+- superseded_on: `2026-08-18`
+- revalidated_on: `2026-08-18`
 - owner_agent: `reference-verification-agent`
 - date: `2026-08-09`
 - review_fix_date: `2026-08-10`
 
+The 2026-08-09 evidence below is preserved as a historical record of the former 11-station,
+component-scale comparison. ADR-022 and the regenerated 20-row element-endpoint CSV supersede
+that identity and tolerance. The following revalidation is the current reference-gate evidence.
+
+## 2026-08-18 Common-policy Revalidation
+
+`cmake --build .harness/build --config Debug` passed, followed by
+`ctest --test-dir .harness/build -C Debug --output-on-failure`: 214/214 tests passed.
+The B33 reference test generated
+`.harness/build/reference/cantilever-beam-b33/comparison.json` from the exact read-only
+reference paths.
+
+- exact canonical rows: 212 = 66 displacement + 66 reaction + 80 direct element-endpoint
+  section-resultant rows
+- exact families: 6; all row gates and family RMS gates passed
+- direct section identity: 20 endpoint rows, 10 B33 elements x 2 connectivity-matched endpoints
+- warnings, identity/schema/nonfinite failures: 0
+- overall verdict: `passed=true`
+
+| family | rows | scale | near-zero rows | max absolute error | scale-relative RMS |
+| --- | ---: | ---: | ---: | ---: | ---: |
+| translation `UX/UY/UZ` | 33 | `1.90476272e-2` | 23 | `5.333229170789711e-10` | `8.459623217000381e-9` |
+| rotation `URX/URY/URZ` | 33 | `2.85714399e-3` | 23 | `1.000013943180944e-10` | `1.1723557271997219e-8` |
+| reaction force `RF1/RF2/RF3` | 33 | `1.0e6` | 32 | `8.195638656616211e-7` | `2.0922817757699256e-13` |
+| reaction moment `RM1/RM2/RM3` | 33 | `1.0e7` | 32 | `5.0514936447143555e-6` | `8.811160558471221e-14` |
+| section force `N` | 20 | `0` | 20 | `0` | `0` |
+| section moment `T/My/Mz` | 60 | `1.0e7` | 41 | `1.2499958951957524e-1` | `2.2910664449287597e-9` |
+
+All values above come from the generated JSON ledger. The historical report body starts below
+and must not be read as the current identity/tolerance evidence.
+
 The prerequisite build/test report has status
 `pass-for-reference-verification`. This report applies only the approved Abaqus
 B33 reference tolerance. It does not approve physics sanity or release readiness.