v1.6.3 "Tempered Anvil"

i386 crash fix

• Fix: segfault on 32-bit (i386) systems. Four sqlite3_mprintf calls in ca_file.c used %ld for time_t values, but _TIME_BITS=64 makes time_t 8 bytes (long long) on 32-bit targets. va_arg read only 4 bytes per value, corrupting the stack and crashing when the shifted expiration_time was dereferenced as a char*. Now uses %lld with explicit (long long) casts. (PR #85 by @tzbkk, reported via Debian CI)

Database-compatible with 1.4.0 — no migration needed.