Persist section renumbering

docs/circuit-list-editor-api.md

@@ -37,9 +37,8 @@ snapshots contain zero, one or multiple complete device rows. Move commands
 contain each row's expected and target circuit plus its exact expected and
 target sort order. This makes deletion and moves undoable without generating
 replacement identities or renumbering circuits. Existing Circuit and
-CircuitDeviceRow cell edits, standalone insert/delete actions and device-row
-moves and reorders in the editor consume these endpoints. The renumber UI path
-is still being migrated.
+CircuitDeviceRow cell edits, standalone insert/delete actions, device-row
+moves, reorders and explicit renumbering in the editor consume these endpoints.
 
 `circuit-device-row.move` targets existing circuits in the same circuit list.
 `circuit-device-row.move-with-new-circuit` atomically creates exactly one
@@ -176,32 +175,11 @@ Response sketch:
   - preview next identifier for section (`prefix + maxSuffix + 1`)
 
 Circuit and device-row field updates, standalone insertions/deletions, single
-or bulk device-row moves and circuit reorders are available only as the
-corresponding versioned commands through
+or bulk device-row moves, circuit reorders and explicit renumbering are
+available only as the corresponding versioned commands through
 `POST /projects/:projectId/commands`. There are no direct field-update PATCH,
-structure POST, move, reorder, Circuit DELETE or CircuitDeviceRow DELETE
-routes.
-
-### Renumber Section
-
-- `POST /circuit-sections/:sectionId/renumber`
-- Purpose: explicit renumbering by section prefix; never implicit on move/sort.
-
-### Safe Equipment Identifier Update
-
-- `PATCH /circuit-sections/:sectionId/equipment-identifiers`
-- Purpose: apply explicit per-circuit identifiers safely even with unique constraints.
-
-Request sketch:
-
-```json
-{
-  "identifiers": [
-    { "circuitId": "cir_1", "equipmentIdentifier": "-2F1" },
-    { "circuitId": "cir_2", "equipmentIdentifier": "-2F2" }
-  ]
-}
-```
+structure POST, move, reorder, renumber, identifier-restore, Circuit DELETE or
+CircuitDeviceRow DELETE routes.
 
 ## Removed Legacy Endpoints