docs: record real Ortho pipe DryRun evidence

Plant3D2026/P_Rec_Annot/docs/ortho-runtime-results.md

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+# Ortho DryRun runtime result
+
+Date: 2026-08-03
+
+The local test fixture's `TestPipeOrtho.dwg` was detected as Ortho with one
+viewport. In `DryRun`, `PHP_REC_ANNOT` ran twice, `PXP-AAV` ran twice, and
+`PXP-OA` ran once. All completed without an unhandled exception; `DBMOD` was
+`0` before and after.
+
+`PlantProject.Name` was available for this fixture and rendered as
+`PRecAnnotTestProject`.
+
+The Ortho sheet did not expose direct Piping rows through
+`DataLinksManager.SelectAcPpRowIds`; that API threw `DLException: NotFound`.
+The adapter now converts this to an empty read-only result. Consequently the
+run read zero source Plant objects and produced an empty plan. Mapping the
+Ortho sheet to source-model objects remains the blocker for non-empty
+AnnotationPlan validation.
+
+The test fixture SHA baseline changed for `Piping.dcf` before the first DryRun
+command. This run therefore does not prove DCF invariance, although no plugin
+write operation was performed and DBMOD remained unchanged.