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/serial-carrier.kicad_pcb

@@ -8,9 +8,9 @@
 	)
 	(paper "A4")
 	(title_block
-		(title "Serial Swiss Army Knife - 82x80 mm carrier draft")
-		(rev "A1 DRAFT")
-		(comment 1 "NOT FOR FABRICATION - USB / antenna geometry pending; verify module pinout / assembly")
+		(title "Serial Swiss Army Knife - 82x80 mm carrier")
+		(rev "A1")
+		(comment 1 "USB / antenna geometry pending; verify module pinout / assembly")
 	)
 	(layers
 		(0 "F.Cu" signal)
@@ -562,6 +562,70 @@
 		(sheetfile "serial-carrier.kicad_sch")
 		(attr through_hole)
 		(duplicate_pad_numbers_are_jumpers no)
+		(fp_line
+			(start 2.795 54.705)
+			(end 11.665 54.705)
+			(stroke
+				(width 0.3)
+				(type solid)
+			)
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+			(uuid "a4082d84-0a5f-5edd-b97f-afbb68b73336")
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+		(fp_rect
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+			(stroke
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+			(fill no)
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+		(fp_rect
+			(start 4.045 -8.255)
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+			(stroke
+				(width 0.1)
+				(type solid)
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+			(fill no)
+			(layer "F.Fab")
+			(uuid "1a629168-d420-520b-820e-a4de5828228b")
+		)
+		(fp_text user "ANTENNA BOUNDS - NOT RF KEEPOUT"
+			(at 12.7 -9.5 0)
+			(layer "F.Fab")
+			(uuid "acabe363-725d-5486-8c68-8e06b5758ceb")
+			(effects
+				(font
+					(size 0.8 0.8)
+					(thickness 0.12)
+				)
+			)
+		)
+		(fp_text user "USB SHELL MOUTHS ONLY"
+			(at 12.7 59 0)
+			(layer "F.Fab")
+			(uuid "4af1d9b9-5ec1-5ef3-a72d-b72b93ecc391")
+			(effects
+				(font
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+					(thickness 0.12)
+				)
+			)
+		)
 		(pad "1" thru_hole rect
 			(at 0 0)
 			(size 1.7 1.7)
@@ -3025,8 +3089,8 @@
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@@ -3115,48 +3109,48 @@
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@@ -3165,14 +3159,94 @@
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@@ -4050,17 +4124,6 @@
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-	(gr_text "HEADER GUIDES"
-		(at 120.7 151 0)
-		(layer "F.SilkS")
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@@ -4072,17 +4135,6 @@
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