fix: drop slow startup ping, log connect time

verify_connection retried DEVICE_INFO pings up to 3x2s,
blocking startup for ~6s even when the module just needs
more time to come up. The main loop already pings every 5s
and shows DEVICE_INFO in the type breakdown, so the upfront
check added latency without useful signal.

Log how long opening the port took instead.

tools/telemetry.c

@@ -5,7 +5,6 @@
 #include <time.h>
 
 #include "celrs/crsf.h"
-#include "celrs/crsf_param.h"
 #include "celrs/crsf_telemetry.h"
 #include "celrs/logger.h"
 #include "celrs/serial.h"
@@ -56,6 +55,11 @@ static void sleep_ms(int ms) {
 #endif
 }
 
+/* Milliseconds elapsed since a clock() reading - used to time startup. */
+static double elapsed_ms(clock_t start) {
+    return (double)(clock() - start) * 1000.0 / CLOCKS_PER_SEC;
+}
+
 /* --------------------------------------------------------------------------- */
 /* ANSI helpers - all go to stdout so dashboard owns it                        */
 /* --------------------------------------------------------------------------- */
@@ -422,20 +426,11 @@ static int list_ports(void) {
     return 0;
 }
 
-/* Send a ping and wait for DEVICE_INFO to verify the module responds. */
-static int verify_connection(cel_serial_port* port) {
-    /* The module may take a few seconds to respond to the first ping,
-     * so retry a few times before giving up. */
-    for (int attempt = 0; attempt < 3; attempt++) {
-        if (cel_crsf_param_ping(port, 2.0f) == 0) return 0;
-    }
-    cel_log_warn("No DEVICE_INFO response - module may not be connected");
-    return -1;
-}
-
 int main(int argc, char const* argv[]) {
     char const* port_path = NULL;
     int baud_rate = 0; /* 0 = auto-probe */
+    char msg[256];
+    clock_t t_startup = clock();
 
     for (int i = 1; i < argc; i++) {
         if (strcmp(argv[i], "--list") == 0) {
@@ -450,10 +445,13 @@ int main(int argc, char const* argv[]) {
 
     /* Auto-detect port if not specified */
     if (port_path == NULL) {
+        clock_t t = clock();
         char detected[256];
         if (cel_serial_find_elrs_port(detected, sizeof(detected)) == 0) {
             port_path = detected;
-            cel_log_info("Auto-detected ELRS port");
+            snprintf(msg, sizeof(msg), "Auto-detected ELRS port (%.0f ms)",
+                     elapsed_ms(t));
+            cel_log_info(msg);
         } else {
             cel_log_err("No ELRS-like port found. Use --list to see ports.");
             return 1;
@@ -477,15 +475,10 @@ int main(int argc, char const* argv[]) {
         return 1;
     }
 
-    char msg[256];
+    snprintf(msg, sizeof(msg), "Connected to %s (%d baud) in %.0f ms",
-    snprintf(msg, sizeof(msg), "Connected to %s (%d baud)", port_path, actual_baud);
+             port_path, actual_baud, elapsed_ms(t_startup));
     cel_log_info(msg);
 
-    /* Verify module responds to CRSF ping */
-    if (verify_connection(port) != 0) {
-        cel_log_warn("Continuing anyway - telemetry may not arrive");
-    }
-
     /* Create CRSF stream for incremental parsing */
     cel_crsf_stream* stream = cel_crsf_stream_create();
     if (stream == NULL) {