feat(L02): add FPGA bring-up and programming card

tests/validate_board_contract.py

@@ -0,0 +1,9 @@
+#!/usr/bin/env python3
+"""Validate that the repository carries an explicit, unclaimed board template."""
+import sys
+from pathlib import Path
+text = Path(sys.argv[1]).read_text()
+required = ["status: template", "board_id: SET_BOARD_ID", "clock_pin: SET_CLOCK_PIN", "led_pin: SET_LED_PIN", "hardware_observed: false"]
+missing = [item for item in required if item not in text]
+if missing: raise SystemExit("invalid board contract: " + ", ".join(missing))
+print("BOARD-CONTRACT status=template hardware_observed=0")