Normalize empty addresses once at the symbol-inventory interpretation
boundary. Keep Swift and Objective-C records with null locations, preserve
the original empty value in evidence.reported_address, and retain partial
coverage instead of failing the entire metadata result. Nonempty provider
address syntax remains unchanged.
Validation: domain and production-registration MCP regressions failed before
the fix. Ten focused files passed 181 tests with 2 skipped, including SDK
converted JSON Schema/catalog validation and graph consumers. npm run check
and docs:check passed (5 documentation tests). Fixture provider only; no
native-provider malformed-symbol or Windows runtime reproduction claimed.
BREAKING CHANGE: Swift symbol address can now be null when the provider has
no location. Clients consuming swift_symbols must handle an unknown address.
The original provider value is retained in optional evidence.reported_address.
Refs #4542
morluto
8116dc0651