Advance PCB carrier to A1 layout

Reposition the ESP32 and RS-232 reference within the notched outline,
preserve the A0 snapshot, and add second-pass two-layer routing
evidence.
Refresh validation reports and draft previews while keeping fabrication
status provisional.

hardware/PCB/validation/pcb-routing-check.json

@@ -1,39 +1,39 @@
 {
   "immutable_geometry_nets_pads_linkage_preserved": true,
-  "board_sha256": "03b69c4084dba328b11e2373c219e8fe462bcb3add934cf9f527214b21bd9cb6",
-  "independent_min_different_net_or_npth_clearance_mm": 0.2749999999999886,
+  "board_sha256": "53e36538c0669604457b9e1a9ff1b1e20422970e8f9f356088c4581868ad5045",
+  "independent_min_different_net_or_npth_clearance_mm": 0.2705441169852849,
   "closest_items": [
-    "R2.2:c118f27f-8ad4-4abe-b9c0-a30a22fe60c9",
-    "99fb402a-445b-4eba-aedf-76b7f0cad042"
+    "U1.38:4b8eabef-8493-437d-bd02-cb9ff4afd7cd",
+    "d95f45cb-7fa4-4203-a786-0a069425e2b8"
   ],
-  "min_copper_or_npth_edge_gap_mm": 0.5250000000000057,
+  "min_copper_or_npth_edge_gap_mm": 1.9,
   "min_rf_gap_mm": 0.025000000000005684,
-  "min_via_to_other_drilled_hole_gap_mm": 0.8401754250991242,
+  "min_via_to_other_drilled_hole_gap_mm": 0.8205441169852848,
   "track_width_counts": {
-    "0.25": 425,
-    "0.5": 144
+    "0.25": 451,
+    "0.5": 114
   },
   "routed_length_mm_by_net": {
-    "/BTN_SELECT": 95.16152954766495,
-    "/GND": 152.2615364335217,
-    "/+3V3": 106.94219089103528,
-    "/RS_DCD": 47.76152984055992,
-    "/RS_DSR": 56.835284377834164,
-    "/RS_RI": 66.02000635033798,
-    "/RS_DTR": 52.162796381301995,
-    "/RS_RTS": 56.23655121147421,
-    "/RS_CTS": 58.073809511675655,
-    "/RS_TX": 47.51030692030297,
-    "/RS_RX": 43.90406233625865,
-    "/RS_VALID": 64.36573922778403,
-    "/RS_OFF_N": 67.05000417516253,
-    "/BTN_PREVIOUS": 86.95076506672746,
-    "/OLED_SDA": 54.781626385188304,
-    "/OLED_SCL": 53.30787155502609,
-    "/BTN_NEXT": 106.4266552277327
+    "/BTN_SELECT": 88.94832552628598,
+    "/GND": 141.68412246223386,
+    "/+3V3": 90.29604731966161,
+    "/RS_DCD": 43.068490178879834,
+    "/RS_DSR": 55.09398706495997,
+    "/RS_RI": 67.91373841554615,
+    "/RS_DTR": 52.53487761643567,
+    "/RS_RTS": 60.056714985368814,
+    "/RS_CTS": 63.65082753507114,
+    "/RS_TX": 53.135260491559045,
+    "/RS_RX": 51.637429252872906,
+    "/RS_VALID": 72.10630197626116,
+    "/RS_OFF_N": 78.04100118378895,
+    "/BTN_PREVIOUS": 78.83370879187974,
+    "/OLED_SDA": 62.65168524184884,
+    "/OLED_SCL": 61.1779295330028,
+    "/BTN_NEXT": 101.24898628384834
   },
-  "tracks": 569,
-  "vias": 20,
+  "tracks": 565,
+  "vias": 22,
   "copper_zones": 0,
   "drc_freshly_run": true,
   "drc_violations": 0,