Here are the classes, structs, unions and interfaces with brief descriptions:

Noxy
Ndirectory	The oxy::directory namespace contains interfaces and functions for synchronizing and updating the metadata directory
Nsettings
Cconfig_path_t	A singleton struct that holds the file path to the configuration INI file
Cexpand_fn	A function object that expands environment variables in the settings paths
Cget_fn	A function object that retrieves configuration settings
Cload_fn	A function object that loads configuration settings from an INI file
Cremove_quote_fn	A function object that removes surrounding quotes from a string if they exist
Cset_fn	A function object that sets configuration properties in an INI file
Csettings_t	Represents the configuration settings for the oxy directory service
Ccontext_t	Represents a context for database operations, encapsulating a connection and schema information
Ccount_fn	Function object for counting data in the database
Cenum_missing_fn	Function object for enumerating missing entries
Cget_context_fn	Function object for obtaining a context_t from a connection and schema
CIConnection	Interface for a connection to a Thrift service, supporting both pipe and socket connections
CIMetadata	Interface for interacting with the metadata service
CIPack	Interface for interacting with the pack service
CISyncDirectory	Interface for synchronizing the metadata directory
CITimeline	Interface for interacting with the timeline service
CIUpdateDirectory	Interface for updating the metadata directory
Cpull_fn	Function object for pulling data from the database
Cpush_fn	Function object for pushing data to the database
Cremove_all_fn	Function object for removing all data from the database
Cremove_fn	Function object for removing data from the database
Creset_settings_fn	Function object for resetting the configuration settings to default values
Cset_settings_fn	Function object for setting the configuration settings from a file
Cssl_context	Represents the SSL context for secure connections, including CA, certificate, and key information
Csettings_t	Represents the configuration settings for the oxy directory service, including folder paths, file filters, network settings, and SSL certificate paths