fix(infra): Q16_SCALE int not float, add missing Path/sys imports

- Q16_SCALE: float → int in lib/q16.py (int // float returns float,
  breaking Q16_16 integer contract in gccl_waveprobe, vcn_famm_transport)
- qr_spatial_hash.py: sys → _sys (only _sys was imported)
- Add missing 'from pathlib import Path' to 7 files that use Path()
  without importing it: test_fpga, compare_tier1_vs_tier2,
  generate_avm_gold_trace, burgers_triad_core, hot_path_cold_path,
  sabotage_prevention, generate_diat_tables
- hot_path_cold_path.py: also add missing 'import sys'

Co-Authored-By: Allaun Silverfox <bigdataiscoming+9i37y6j2@protonmail.com>

4-Infrastructure/hardware/test_fpga.py

@@ -11,6 +11,7 @@ import serial
 import struct
 import time
 import sys
+from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
 from lib.q16 import Q16_ONE, Q16_SCALE, to_q16

4-Infrastructure/lib/q16.py

@@ -9,7 +9,7 @@ from __future__ import annotations
 
 Q16_ONE: int = 0x00010000   # 65536
 Q16_HALF: int = 0x00008000
-Q16_SCALE: float = 65536.0
+Q16_SCALE: int = 65536
 
 
 def to_q16(value: float) -> int:

4-Infrastructure/shim/compare_tier1_vs_tier2.py

@@ -6,6 +6,7 @@ import os
 import sys
 from collections import Counter, defaultdict
 from math import sqrt
+from pathlib import Path
 
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
 from lib.jsonl import load_jsonl

4-Infrastructure/shim/qr_spatial_hash.py

@@ -17,7 +17,7 @@ from pathlib import Path
 import sys as _sys
 _sys.path.insert(0, str(Path(__file__).resolve().parent))
 
-sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
+_sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
 from lib.q16 import Q16_SCALE, to_q16
 
 

5-Applications/scripts/generate_avm_gold_trace.py

@@ -1,6 +1,7 @@
 import json
-
 import sys
+from pathlib import Path
+
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
 from lib.q16 import to_q16
 

5-Applications/scripts/gsp/burgers_triad_core.py

@@ -1,6 +1,7 @@
 import numpy as np
-
 import sys
+from pathlib import Path
+
 sys.path.insert(0, str(Path(__file__).resolve().parents[3] / "4-Infrastructure"))
 from lib.q16 import Q16_ONE, q16_mul
 

5-Applications/scripts/hot_path_cold_path.py

@@ -25,6 +25,9 @@ from dataclasses import dataclass
 from enum import Enum
 from collections import deque
 
+import sys
+from pathlib import Path
+
 try:
     from sluq_triage import SLUQTriageSystem, StochasticTrajectory, TriageDecision
     _HAS_SLUQ_TRIAGE = True

5-Applications/scripts/sabotage_prevention.py

@@ -28,6 +28,8 @@ from enum import Enum
 from collections import defaultdict, deque
 
 import sys
+from pathlib import Path
+
 sys.path.insert(0, str(Path(__file__).resolve().parents[2] / "4-Infrastructure"))
 from lib.q16 import Q16_ONE, Q16_SCALE, from_q16, q16_add, q16_ge, q16_gt, q16_sub, to_q16
 

5-Applications/tools-scripts/utils/generate_diat_tables.py

@@ -1,6 +1,7 @@
 import math
-
 import sys
+from pathlib import Path
+
 sys.path.insert(0, str(Path(__file__).resolve().parents[3] / "4-Infrastructure"))
 from lib.q16 import to_q16