feat(libSceRudp): implement sceRudpGetStatus

Zero the status buffer after initialization like sceRudpGetContextStatus,
and return the not-initialized error before it, instead of throwing.

core/libs/prx/libSceRudp/Export.cpp

@@ -52,9 +52,13 @@ int APS5_VABI sceRudpActivate() {
 }
 
 int APS5_VABI sceRudpGetStatus(void* status, std::size_t size) {
-    (void)status;
-    (void)size;
-    NotImplemented_nid_no_patch(__func__);
+    std::lock_guard<std::mutex> lk(g_mutex);
+    if (!g_inited) {
+        return RUDP_ERROR_NOT_INITIALIZED;
+    }
+    if (status != nullptr && size != 0) {
+        std::memset(status, 0, size);  // state 0 = idle, no connections
+    }
     return 0;
 }
 

docs/dev/TechnicalDebt.md

@@ -40,7 +40,7 @@ Throughout the project, every function at every stage either **does exactly what
 
 - [sceNpEntitlementAccessGetEntitlementKey](../../core/libs/prx/libSceNpEntitlementAccess/Export.cpp) - the three-argument signature, 16-byte key and errors `0x817D0002`/`0x817D0007` follow [KytyPS5](https://github.com/KytyPS5/KytyPS5/blob/main/src/libs/libNet.cpp); PPSA01521 passes a service label, entitlement label and output pointer. Only the no-key path is implemented: local entitlement labels carry no keys, and the output is untouched on failure. Console error precedence and key provisioning are unverified
 - [sceNpEntitlementAccess{Request,Poll}{Unified,Service}EntitlementInfoList](../../core/libs/prx/libSceNpEntitlementAccess/Export.cpp) - signatures unknown; no reference implements them, so they are declared without parameters. Like the consume requests in the same library, they report the signed-out NP state with `SCE_NP_ERROR_SIGNED_OUT` (`0x80550006`) and write nothing. PPSA15657 calls the unified request during start-up and continues past the error. Whether the console fails at the request or at the poll when signed out is unverified
-- [sceRudpGetStatus](../../core/libs/prx/libSceRudp/Export.cpp) - PPSA01521 passes an output pointer and byte count `0xF8`; the status layout, size rules and error behavior are unknown. The export throws without writing output, including after initialization. [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/rudp/rudp.cpp) declares it without arguments and returns success without writing status
+- [sceRudpGetStatus](../../core/libs/prx/libSceRudp/Export.cpp) - PPSA01521 passes an output pointer and byte count `0xF8`; the status layout and size rules are unknown, so the buffer is zeroed like `sceRudpGetContextStatus` (state 0 = idle, no connections) and the size is not validated. It returns `RUDP_ERROR_NOT_INITIALIZED` before initialization and 0 otherwise, as `sceRudpGetContextStatus` does. [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/rudp/rudp.cpp) declares it without arguments and returns success without writing status
 - [sceHttpSetCookieEnabled](../../core/libs/prx/libSceHttp/Export.cpp) - the two-argument signature and 0/1 enable values follow [VitaSDK](https://github.com/vitasdk/vita-headers/blob/master/include/psp2/net/http.h) and [shadPS4](https://github.com/shadps4-emu/shadPS4/blob/main/src/core/libraries/network/http.cpp); PPSA01521 passes 0 to disable cookies. Disabling succeeds because the offline HTTP backend has no cookie engine; enabling throws. Invalid enable values use the same error as `sceHttpSetInflateGZIPEnabled`. Like the existing offline HTTP setters, the handle is not validated; requests still fail with the network error. Console behavior is unverified
 
 - [sceHmd2Initialize](../../core/libs/prx/libSceHmd2/Export.cpp) (libSceHmd2) - the error the console returns when the PS VR2 runtime is unavailable is unknown; it returns libSceHmd's `UNSUPPORTED_FEATURE` (0x81110016). PPSA01317 passes a pointer to 16 zeroed bytes and only tests the result for non-zero