feat(native-certgen): implement logging subsystem

Multi-output logging via tracing: /dev/kmsg for logcat, rotating file
appender (512KB, 3 files), stderr for debug. Diagnostic ZIP dump with
log files and TEE status snapshots. Verbose toggle via JNI flag or
.verbose marker file.

native-certgen/src/lib.rs

@@ -3,3 +3,4 @@ mod types;
 mod keygen;
 pub mod keybox;
 pub mod attestation;
+pub mod logging;