fix: add camera node IPEX antenna hole

hardware/README.md

@@ -39,6 +39,7 @@ Each camera node is two ESP boards in a small upright stand-mounted case. The ca
 | Small rocker switch | 1 | ~$1–$3 | On/off switch; prototype CAD assumes 13 × 19 mm snap-in opening |
 | USB-C female panel/breakout connector | 1 | ~$1–$4 | Bottom power input; prototype CAD assumes ~10.5 × 4.5 mm rounded visible opening plus shallow underside recess; measure purchased part |
 | USB-A female panel/breakout connector | 1 | ~$1–$4 | Right-side GoPro power passthrough output; prototype CAD assumes ~16 × 8 mm side opening; measure purchased part |
+| IPEX/U.FL antenna pigtail or bulkhead lead | 1 | TBD | Left-side antenna exit opposite the USB-A port; prototype CAD assumes a 5.0 mm circular through-hole plus shallow exterior recess; measure exact pigtail/bulkhead diameter before production |
 | USB power bank (5000 mAh+) | 1 | ~$10 | Powers camera node and GoPro |
 | Short USB cables / wiring | as needed | ~$2–$5 | Power bank → node USB-C input; node 5 V passthrough → USB-A female → GoPro USB cable; internal power/signal wiring |
 | M2 or small self-tapping screws | 4 | <$1 | Front service lid screws; pilot holes are parametric |
@@ -52,7 +53,7 @@ Each camera node is two ESP boards in a small upright stand-mounted case. The ca
 **Current source:** `hardware/case/camera-node-case-v4.scad`
 **Pipeline:** `hardware/DESIGN_PIPELINE.md`
 
-The current v4 CAD replaces the rejected wide/low electronics-box layout with a tall appliance-style enclosure matching the original upright reference: a clean vertical body, large inset front panel, OLED near the top, open blank middle area, two long rounded lower slots, a bottom USB-C female power input, and a right-side USB-A female passthrough power port for the GoPro. It also replaces the v3 clamp/dovetail concept with a simpler strap-mounted field enclosure:
+The current v4 CAD replaces the rejected wide/low electronics-box layout with a tall appliance-style enclosure matching the original upright reference: a clean vertical body, large inset front panel, OLED near the top, open blank middle area, two long rounded lower slots, a bottom USB-C female power input, a right-side USB-A female passthrough power port for the GoPro, and a left-side IPEX/U.FL antenna pigtail/connector hole opposite the USB-A. It also replaces the v3 clamp/dovetail concept with a simpler strap-mounted field enclosure:
 
 1. **Case body** — shell sized around ESP32-C3 Super Mini + ESP-01S with service/wiring clearance.
 2. **Flush/recessed full-height front service lid** — screw-on front panel with locating lip and a restrained raised/recessed border.
@@ -64,6 +65,7 @@ The current v4 CAD replaces the rejected wide/low electronics-box layout with a
    - two long rounded lower front slots styled after the reference appliance face.
 4. **Rear vertical zip-tie pass-through brackets** — two low-profile external brackets, one left and one right of center, with top/bottom anchor pads and long vertical side-access openings. Zip ties feed laterally in the X direction behind each raised bridge face instead of top-to-bottom, while the rear wall stays sealed.
 5. **USB power ports** — bottom USB-C female power input and right-side USB-A female passthrough power output for a GoPro USB power cable.
+6. **Left-side antenna exit** — prototype 5.0 mm round through-wall IPEX/U.FL antenna pigtail/connector clearance, placed opposite the right-side USB-A port at the same vertical position, with a shallow exterior circular recess for visual/exit relief. Measure the actual antenna pigtail/bulkhead before production.
 
 ### Export wrappers
 
@@ -100,7 +102,7 @@ openscad -D 'part="front_review"' -o hardware/case/camera-node-case-v4-front-rev
 - **Layer:** 0.2 mm typical.
 - **Infill:** 20% gyroid minimum; 30%+ recommended around rear vertical zip-tie bracket anchor pads/bridges.
 - **Supports:** likely minimal/none depending on orientation; verify the rear lateral side-feed openings remain open and check USB-C/USB-A port cutouts in slicer.
-- **Post-processing:** fit 4 lid screws; deburr OLED/LED/switch cutouts; clear any stringing inside the rear side-feed openings; soften strap-contact edges if the printed radius is too sharp for cloth ties.
+- **Post-processing:** fit 4 lid screws; deburr OLED/LED/switch and IPEX antenna exit cutouts; clear any stringing inside the rear side-feed openings; soften strap-contact edges if the printed radius is too sharp for cloth ties.
 
 ## Expected Status Screen Content