Upload Firewall: Duplicate Key Error

Two rooms sharing an ID means two geometries competing for one database record. Whichever loses is either overwritten or dropped, and the failure is silent: the upload appears to succeed while a real room quietly stops existing in reporting.

• Room text identifiers are tested for uniqueness across the space layer before commit.
• Duplicates block the upload rather than being resolved by arbitrary precedence.
• Both conflicting locations are reported with click-to-zoom navigation.
• The link proceeds only once every identifier is unique.

Prevents database conflicts where two rooms attempt to map to a single primary key.