Integrate Measured ESP32 PCB Geometry

- Add measured F.Fab bounds and USB mouth markers
- Add guarded preservation and regression validation
- Refresh review exports and remove draft presentation labels

hardware/PCB/validation/pcb-parity-drc.json

@@ -1,7 +1,7 @@
 {
     "$schema": "https://schemas.kicad.org/drc.v1.json",
     "coordinate_units": "mm",
-    "date": "2026-09-21T11:39:10",
+    "date": "2026-09-21T22:52:26",
     "ignored_checks": [
         {
             "description": "Footprint has no courtyard defined",

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

@@ -1,6 +1,6 @@
 {
   "immutable_geometry_nets_pads_linkage_preserved": true,
-  "board_sha256": "53e36538c0669604457b9e1a9ff1b1e20422970e8f9f356088c4581868ad5045",
+  "board_sha256": "94e941625b3b9fc9a08b9f2d532eb35003ea8da41d456a1c67269b9651200e05",
   "independent_min_different_net_or_npth_clearance_mm": 0.2705441169852849,
   "closest_items": [
     "U1.38:4b8eabef-8493-437d-bd02-cb9ff4afd7cd",

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

@@ -1,7 +1,7 @@
 {
     "$schema": "https://schemas.kicad.org/drc.v1.json",
     "coordinate_units": "mm",
-    "date": "2026-09-21T11:39:13",
+    "date": "2026-09-21T22:33:53",
     "ignored_checks": [
         {
             "description": "Footprint has no courtyard defined",

hardware/PCB/validation/pcb-source-netlist.xml

@@ -2,7 +2,7 @@
 <export version="E">
   <design>
     <source>/home/mscholz/Repos/ESP32_serial_swiss_army_knife/hardware/PCB/serial-carrier.kicad_sch</source>
-    <date>2026-09-21T11:39:08</date>
+    <date>2026-09-21T22:52:19</date>
     <tool>Eeschema 10.0.6-1.fc44</tool>
     <sheet number="1" name="/" tstamps="/">
       <title_block>

hardware/PCB/validation/pcb-u1-update.json

@@ -0,0 +1,13 @@
+{
+  "measured_library_matches_embedded_u1": true,
+  "existing_uuids_pads_nets_placement_routing_settings_and_unrelated_graphics_preserved": true,
+  "presentation_label_cleanup": true,
+  "silk_refresh_idempotent": true,
+  "stale_geometry_negative_control": true,
+  "silk_clipped_to_carrier": true,
+  "usb_mouth_markers": 2,
+  "generated_silk_items": 91,
+  "baseline_sha256": "53e36538c0669604457b9e1a9ff1b1e20422970e8f9f356088c4581868ad5045",
+  "board_sha256": "b9e020939fff42b5c7a3161ed89af9dc3c1b9c016268311b3db7ab407ed67192",
+  "project_sha256": "9ad5b992785ebfe01fa7ea4e1aa391a2c7d7f1f2c3b1c13136173c301ecb6516"
+}

hardware/PCB/validation/pcb-validation-summary.json

@@ -130,7 +130,7 @@
   ],
   "not_validated": [
     "male module pin map/header fit",
-    "ESP32 geometry and complete assembly envelope/heights",
+    "ESP32 measured-planar 1:1 fit and complete assembly envelope/heights",
     "header/socket fit",
     "RF performance and antenna clearance",
     "power/return-path integrity",