config: skip a line the parser cannot buffer instead of stopping

execute_config() replays the saved configuration line by line into
cmd_buffer. A line that does not fit, or one cmd_tokenize() rejects,
ended the replay right there: everything below it was silently left
unapplied, while the file itself and the editor showing it stayed
complete. On a switch here, a 130-byte line placed after the last real
setting was enough to lose every line that followed it on the next boot.

Report the offending line and carry on with the next one. The skip flag
lives across the flash page refill, so a long line that crosses a page
boundary is not resumed halfway and run as a truncated command.

cmd_parser.c

@@ -1956,6 +1956,7 @@ void execute_config(void) __banked
 	save_cmd = 0;
 
 	uint8_t cmd_idx = 0;
+	uint8_t skipping = 0;
 	do {
 		flash_region.addr = pos;
 		flash_region.len = FLASH_READ_BURST_SIZE;
@@ -1966,29 +1967,34 @@ void execute_config(void) __banked
 		do {
 			if (cmd_idx >= (CMD_BUF_SIZE - 1)) {
 				cmd_buffer[cmd_idx] = NUL;
-				print_string("ERROR: Command too long: ");
+				print_string("ERROR: Command too long, skipped: ");
 				print_string_x(cmd_buffer);
 				write_char('\n');
-				err_status = ERR_CMD_TOO_LONG;
+				cmd_idx = 0;
-				goto config_done;
+				skipping = 1;
 			}
 			c = flash_buf[cfg_idx++];
 			if (c == 0 || c == '\n') {
+				if (skipping) {
+					skipping = 0;
+				} else {
 					cmd_buffer[cmd_idx] = NUL;
 					if (cmd_idx) {
 						cmd_tokenize();
-					if (err_status != ERR_OK)
+						if (err_status == ERR_OK)
-						goto config_done;
 							cmd_parser();
 					}
+				}
 				if (c == 0)
 					goto config_done;
 				cmd_idx = 0;
 				continue;
 			}
 
+			if (!skipping) {
 				cmd_buffer[cmd_idx] = c;
 				cmd_idx++;
+			}
 		} while (cfg_idx);
 
 		pages_left--;