fix(sqlite): avoid deprecated time format components

[lovasoa]

The committed time 0.3.55 dependency deprecates the manually constructed date/time components and byte literals, causing 40 errors under CI's -D warnings even with Rust pinned to 1.98.1. This is the failure blocking #61.

Build the existing SQLite format descriptions with time's compile-time macro, retaining the same optional separators, seconds, fractions and offsets. This avoids a dependency bump or warning suppression.

Validation on Rust 1.98.1:

• cargo fmt --all -- --check
• Core Clippy with all database/type features and -D warnings, for both native-tls and rustls.
• Root Clippy with macros and all-targets Clippy using the existing native-tls CI feature sets.
• All four existing SQLite time type integration tests passed (date, time, primitive datetime and offset datetime).

Local test/build commands used --locked; commands involving vendored OpenSSL used OPENSSL_NO_VENDOR=1 to use the installed system OpenSSL.