Bundle sizing

TASK: Bundle sizing (Capital Harness Designer, method "Worst case - Enhanced").

The harness is a tree of nodes joined by branches. Each wire runs along the unique path between its two end nodes
and passes through every branch on that path. For EVERY branch, compute the number of wires through it and its diameter:
- Navy Table = (average outside diameter of the wires in the branch) x factor(n), where n = number of wires;
  factor(n) is given in `navyFactors` for n <= 20; for n > 20, factor = 1.12 x sqrt(n) rounded to 2 decimals.
- Factored CSA = sqrt(1.3 x sum of (each wire's OD squared))
- Combined OD = sum of the two largest wire ODs (a single wire: its own OD).
- Diameter = the greatest of those three, plus 2 x overbraid thickness if the branch is overbraided.
- A branch with no wires has diameter 0.
Round each diameter to 2 decimals.

Wire outside diameter (mm) by gauge: {"12":2.9,"14":2.4,"16":2,"18":1.7,"20":1.45,"22":1.25,"24":1.1}
navyFactors: {"1":1,"2":2,"3":2.15,"4":2.41,"5":2.7,"6":3,"7":3,"8":3.3,"9":3.61,"10":3.81,"11":3.92,"12":4.03,"13":4.24,"14":4.33,"15":4.52,"16":4.62,"17":4.79,"18":4.86,"19":4.86,"20":5.12}
Overbraided branches (thickness mm): {}

Branches:
[
  {"id":"B1","a":"N1","b":"N2"},
  {"id":"B2","a":"N1","b":"N3"},
  {"id":"B3","a":"N1","b":"N4"},
  {"id":"B4","a":"N3","b":"N5"},
  {"id":"B5","a":"N2","b":"N6"}
]

Wires:
[
  {"id":"W1","from":"N4","to":"N5","gauge":22},
  {"id":"W2","from":"N4","to":"N6","gauge":18},
  {"id":"W3","from":"N4","to":"N5","gauge":20},
  {"id":"W4","from":"N6","to":"N5","gauge":12},
  {"id":"W5","from":"N5","to":"N4","gauge":22},
  {"id":"W6","from":"N6","to":"N4","gauge":20},
  {"id":"W7","from":"N4","to":"N6","gauge":12},
  {"id":"W8","from":"N4","to":"N6","gauge":24}
]

Output format (JSON, exactly these keys):
```json
{
 "branches": [
  {
   "id": "B1",
   "wires": 7,
   "diameterMm": 6.42
  }
 ]
}
```