[Gogoshika-ga]

Fixes the two leaks reported in GameAnalytics/GA-SDK-UNITY#59.

Curl client (all desktop platforms)

• curl_easy_cleanup was skipped when curl_easy_perform failed — each failed request leaked the easy handle (on Windows this pins two loopback TCP sockets per failure, eventually exhausting sockets machine-wide with WSAENOBUFS).
• The header curl_slist was never freed — leaked on every request.

Both are now owned by RAII guards (std::unique_ptr with curl deleters), so every exit path cleans up. Also removed a duplicate CURLOPT_SSL_VERIFYPEER setopt.

Linux getConnectionType()

The inner int sock = socket(...) shadowed the outer sock, so close() never ran — leaking one socket per network interface per event. Now a single socket is opened per call, reused for every interface ioctl, closed once; the loop breaks early once WIFI is detected. Semantics unchanged.

[github-actions]

LCOV of commit 2596bf3 during Test Coverage #153

Summary coverage rate:
  lines......: 40.6% (1155 of 2843 lines)
  functions..: 52.5% (210 of 400 functions)
  branches...: no data found

Files changed coverage rate: n/a