fix(opengd77): wire normalisation and import warnings per reference audit

[pskillen]

Problem

#43 reference audit found gaps between documented wire rules and adapter behaviour.

Items

Topic	Documented	Code today
Rx Only	CPS Yes/No	Stored as raw string — not normalised
Zone Skip vs All Skip	Both documented	Only All Skip → scanSkip; Zone Skip in vendorExtras only (may be intentional)
Unresolved zone members	Preserved in sourceMemberNames	No import warning/report to operator
Member column caps	Radio profile	Hard-coded 80/32 in columns.ts until profile export lands

Intended outcome

• Align parse/serialise with docs/reference/opengd77/channels.md where normalisation is specified.
• Surface unresolved zone member names on import (report or validation UI).
• Defer hard-coded caps to radio profile config when export profile issue ships.

References

• docs/reference/opengd77/channels.md
• docs/reference/opengd77/zones.md
• docs/reference/opengd77/radios/baofeng-1701.md — Known gaps section
• Discovered during docs: authoritative OpenGD77 CPS CSV field reference under docs/reference/opengd77/ #43