tools: add data init and auto-reporting to tools and pve section

Introduce telemetry helpers in misc/api.func: _telemetry_report_exit (reports success/failure via post_tool_to_api/post_addon_to_api) and init_tool_telemetry (reads DIAGNOSTICS, starts install timer and installs an EXIT trap to auto-report). Integrate telemetry into many tools/addon and tools/pve scripts by sourcing the remote api.func and calling init_tool_telemetry (guarded with declare -f). Also apply a minor arithmetic formatting tweak in misc/build.func for RECOVERY_ATTEMPT.

tools/addon/netdata.sh

@@ -26,6 +26,11 @@ BFR="\\r\\033[K"
 HOLD="-"
 CM="${GN}✓${CL}"
 silent() { "$@" >/dev/null 2>&1; }
+
+# Telemetry
+source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/api.func) 2>/dev/null || true
+declare -f init_tool_telemetry &>/dev/null && init_tool_telemetry "netdata" "tool"
+
 set -e
 header_info
 echo "Loading..."