Close out functional/robustness findings: iceprog rewire, PR1, ETH_RST, debug provisions

Schematic fixes (PCB placement/routing of new parts pending, F8 lists them):
- FTDI rewired to stock iceprog convention: FLASH_CS ADBUS3->ADBUS4,
  CDONE ACBUS1->ADBUS6, CRESET ACBUS0->ADBUS7 (old pins NC). With a
  blank 93LC46B (default 0403:6010) stock iceprog now works unmodified;
  EEPROM workflow decided: ship blank, FT_PROG optional (keep VID/PID).
- TPS2116 PR1 divider: R3 200k->150k (C25755) - switchover now at
  2.30-2.70V worst case instead of 20mV under the 3.3V rail.
- ETH_RST: R36 10k pull-up to ETH_3V3 (RSTn floats during FPGA config).
- Debug provisions: D6 green heartbeat LED (C72043) on FPGA pin 47,
  D7 red EXI-activity LED (C2286) on pin 48, 330R C25104 series; J4
  6-pin LA header (GND + DBG0-4 = pins 9/10/11/12/6, unpopulated);
  TP1-TP5 test points (3V3/1V2/ETH_3V3/GC_ON/GND, in_bom no); FID1-3
  fiducials placed board-only on the PCB, track-clearance checked.
- Embedded Device:LED / Connector:TestPoint / Conn_01x06 lib symbols.

Closed by analysis (no change): TPS22810 CT cap unnecessary (DS Table 2:
~98us rise at 3.3V with CT=0 -> ~0.5A inrush); RSET_BG 12.4k accepted
(12.3k is E192; WIZnet ref synthesizes it as 12k+300R; 0.8% immaterial).

Verified: ERC 0; netlist 132 vs BOM 125 differing only by the 7
deliberate in_bom=no items (J3, J4, TP1-5); LED polarity and TP rails
confirmed in netlist; PCB DRC 0 errors with fiducials placed.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

hardware/re-bba-rb/Usb Connector.kicad_sch

@@ -4096,10 +4096,6 @@
 		(at 276.86 163.83)
 		(uuid "1d32d965-50db-4ea3-ac37-eff00240d6c8")
 	)
-	(no_connect
-		(at 276.86 97.79)
-		(uuid "1e22b8c4-f6cc-4165-9d6e-40dd2ddab855")
-	)
 	(no_connect
 		(at 52.07 77.47)
 		(uuid "1f0b71fa-6308-4ac1-9492-c9ba20cab6de")
@@ -4180,14 +4176,6 @@
 		(at 276.86 133.35)
 		(uuid "d4d6bdc8-1cd8-4c3b-8f3c-d7b7d09b42cc")
 	)
-	(no_connect
-		(at 276.86 100.33)
-		(uuid "e1e2ed38-79ca-478c-9ef4-aea660fe4a36")
-	)
-	(no_connect
-		(at 276.86 92.71)
-		(uuid "e3816d9e-97cc-4a5e-a385-6e8cb45d3d9f")
-	)
 	(no_connect
 		(at 276.86 120.65)
 		(uuid "f250de11-3d72-4ddb-8a0f-5f79eae94b40")
@@ -5846,7 +5834,7 @@
 	)
 	(hierarchical_label "CRESET"
 		(shape bidirectional)
-		(at 276.86 105.41 0)
+		(at 276.86 100.33 0)
 		(effects
 			(font
 				(size 1.27 1.27)
@@ -5879,7 +5867,7 @@
 	)
 	(hierarchical_label "CDONE"
 		(shape bidirectional)
-		(at 276.86 107.95 0)
+		(at 276.86 97.79 0)
 		(effects
 			(font
 				(size 1.27 1.27)
@@ -5978,7 +5966,7 @@
 	)
 	(hierarchical_label "FLASH_CS"
 		(shape bidirectional)
-		(at 276.86 90.17 0)
+		(at 276.86 92.71 0)
 		(effects
 			(font
 				(size 1.27 1.27)
@@ -13488,4 +13476,16 @@
 			(page "1")
 		)
 	)
+	(no_connect
+		(at 276.86 90.17)
+		(uuid "b5920f10-5eec-4187-b721-cd8e31000c07")
+	)
+	(no_connect
+		(at 276.86 105.41)
+		(uuid "82c046ac-bc0f-496e-b7a9-3b5408f5f602")
+	)
+	(no_connect
+		(at 276.86 107.95)
+		(uuid "dbe89d3c-f430-43e2-93d4-43b2adfa735f")
+	)
 )