S1 #11: bytes read and written, counted per network service

A Counted<> wrapper around the network clients adds what goes through
their buffer read and write to a per-service counter (IRC, Gemini, Debug
Console, Updates); the single-byte calls and print() end up there, so
each byte counts once. `net` prints the totals. For TLS it's the plain
text the service sees.

Checked on the device: a Gemini fetch counts 164,986 in (a 164,970-byte
page and its 16-byte header) and 42 out (the URL and CRLF).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EhqxQ49eCju4CzKYNjZzwT

src/services/gemini_service.cpp

@@ -12,6 +12,7 @@
 #include "gemtext.h"
 #include "platform/console.h"
 #include "sha256.h"
+#include "platform/counted_client.h"
 #include "storage_paths.h"
 
 namespace roro {
@@ -544,7 +545,7 @@ void GeminiService::fetchOne(const std::string& url, GeminiPage& page, bool load
     auto track = [this]() { lowest_ = std::min<size_t>(lowest_, esp_get_free_heap_size()); };
 
     size_t freeBefore = esp_get_free_heap_size();  // what's left once the connection closes again
-    NetworkClientSecure tls;
+    Counted<NetworkClientSecure> tls(net::User::Gemini);
     tls.setInsecure();  // trust on first use: the pinned fingerprint is what counts (Q71)
     tls.setTimeout(15);
     if (!tls.connect(u.host.c_str(), u.portOrDefault())) {