fix(cam_hal): throttle WARN spam so cam_verify_jpeg_soi reduces it's stack footprint

* First occurrence of each warning:
      ESP_DRAM_LOGW()  → zero stack after the first print.
* Subsequent occurrences:
      count with a uint16_t and emit a **literal** ESP_LOGW() only
      every 100th event (~ 60 B stack usage).
* Counters auto-reset at 10 000 to avoid wraparound.

Author: RubenKelevra

driver/cam_hal.c

@@ -42,16 +42,32 @@
 static const char *TAG = "cam_hal";
 static cam_obj_t *cam_obj = NULL;
 
+/* helper to throttle repeated warnings */
+#define CAM_WARN_THROTTLE(first) \
+    do { \
+        if ((warn_soi_miss_cnt) == 0) { \
+            ESP_DRAM_LOGW(TAG, first); \
+        } \
+        if (++(warn_soi_miss_cnt) % 100 == 0) { \
+            ESP_LOGW(TAG, "NO-SOI - 100 additional misses"); \
+        } \
+        if ((warn_soi_miss_cnt) >= 10000) { \
+            ESP_LOGW(TAG, "NO-SOI - counter reset at 10000"); \
+            (warn_soi_miss_cnt) = 0; \
+        } \
+    } while (0)
+
 /* JPEG markers in little-endian order (ESP32). */
 static const uint8_t JPEG_SOI_MARKER[] = {0xFF, 0xD8, 0xFF}; /* SOI = FF D8 FF */
 static const uint16_t JPEG_EOI_MARKER = 0xD9FF;              /* EOI = FF D9 */
 
 static int cam_verify_jpeg_soi(const uint8_t *inbuf, uint32_t length)
 {
     const size_t soi_len = sizeof(JPEG_SOI_MARKER);
+    static uint16_t warn_soi_miss_cnt;
 
     if (length < soi_len) {
-        ESP_LOGW(TAG, "NO-SOI");
+        CAM_WARN_THROTTLE("NO-SOI - JPEG start marker missing (below 3 bytes in length)");
         return -1;
     }
 
@@ -61,7 +77,8 @@ static int cam_verify_jpeg_soi(const uint8_t *inbuf, uint32_t length)
             return i;
         }
     }
-    ESP_LOGW(TAG, "NO-SOI");
+
+    CAM_WARN_THROTTLE("NO-SOI - JPEG start marker missing");
     return -1;
 }