v0.3.3 - Fix function naming consistency: rename find_existing_nrdb_files to find_existing_db_files

- Update function declaration in config.h
- Update function definition in config.c
- Update function calls in config.c and main.c
- Maintain consistency with .db file extension naming convention

This resolves the inconsistency between database file extension (.db) and function names (nrdb)

relay.pid

@@ -1 +1 @@
-1187428
+1190476

src/config.c

@@ -33,7 +33,7 @@ static cJSON* g_pending_config_event = NULL;
 // UTILITY FUNCTIONS
 // ================================
 
-char** find_existing_nrdb_files(void) {
+char** find_existing_db_files(void) {
     DIR *dir;
     struct dirent *entry;
     char **files = NULL;
@@ -342,7 +342,7 @@ int get_config_bool(const char* key, int default_value) {
 // ================================
 
 int is_first_time_startup(void) {
-    char** existing_files = find_existing_nrdb_files();
+    char** existing_files = find_existing_db_files();
     if (existing_files) {
         // Free the array
         for (int i = 0; existing_files[i]; i++) {

src/config.h

@@ -76,7 +76,7 @@ int apply_configuration_from_event(const cJSON* event);
 int apply_runtime_config_handlers(const cJSON* old_event, const cJSON* new_event);
 
 // Utility functions
-char** find_existing_nrdb_files(void);
+char** find_existing_db_files(void);
 char* extract_pubkey_from_filename(const char* filename);
 
 #endif /* CONFIG_H */

src/main.c

@@ -3251,7 +3251,7 @@ int main(int argc, char* argv[]) {
         log_info("Existing relay detected");
         
         // Find existing database file
-        char** existing_files = find_existing_nrdb_files();
+        char** existing_files = find_existing_db_files();
         if (!existing_files || !existing_files[0]) {
             log_error("No existing relay database found");
             nostr_cleanup();