Erroneous message about bionic foot when trying to wear rigid pants

### Describe the bug

Got this message `Can't were more than one rigid item on right bionic foot bottom` while having no bionic when trying to wear fishing waders

### Attach save file

[Monmouth-trimmed.tar.gz](https://github.com/user-attachments/files/29308897/Monmouth-trimmed.tar.gz)

### Steps to reproduce

1. load save
2. Try to wear the fishing waders

### Expected behavior

Not being told about a bionic foot that I don't have

### Screenshots

_No response_

### Versions and configuration

- OS: Windows
- OS Version: 10.0.26200.8457 (25H2)
- Game Version: cdda-experimental-2026-06-24-0412-dirty+SDL3 [64-bit]
- Graphics Version: Tiles
- Game Language: English [en]
- Mods loaded: [
Dark Days Ahead [dda],
Disable NPC Needs [no_npc_food],
Portal Storms Ignore NPCs [personal_portal_storms]
]

### Additional context

_No response_

Load the attached Monmouth-trimmed save and reproduce the error by trying to wear the fishing waders. Trace the rigid-item and bionic-foot validation that produces the message, then verify that wearing the waders no longer reports a bionic foot the character does not have.

Written by the indexing model from the issue text.