* Introduced ApplicationName field to identify clients in DSN
* Set default ApplicationName to "ResolveSpec"
* Updated tests for ApplicationName handling in DSN
Default to TLS export with Insecure/TLSConfig/Headers options, parent-based
ratio sampling (default 0.1), and no query string or Host in span attributes.
Name spans by route template, record status and panics (re-raised), guard the
tracer with atomic.Pointer, reject double init, add init timeout and attribute
length limit, and move to semconv v1.26.0. Add tracing.insecure and
tracing.sample_rate config keys and tests.
Guard viper with an RWMutex, make the singleton race-free and stop
NewManager replacing the global (add SetConfigManager), write saved
configs 0600, search CWD last, add ConfigFileUsed and Config.Validate,
nil-safe PathsConfig.Set, confine PathsConfig.Join, bound GetIPs DNS
lookup, and drop dead Unmarshal in SetConfig. Mark audit status.
* Update CORSConfig to allow dynamic origins based on server instances.
* Add ExternalURLs field to ServerInstanceConfig for additional CORS support.
* Implement GetIPs function to retrieve non-local IP addresses for CORS.
- Add ServersConfig and ServerInstanceConfig structs
- Support configuring multiple named server instances
- Add global timeout defaults with per-instance overrides
- Add TLS configuration options (SSL cert/key, self-signed, AutoTLS)
- Add validation for server configurations
- Add helper methods for applying defaults and getting default server
- Add conversion helper to avoid import cycles