Reduce noisy server logs

[clockwork-labs-bot]

Summary

• Lower routine client connection lifecycle logs from info/warn to debug.
• Lower SQL query, JWT payload lookup, PG socket processing, and migration planning logs to quieter levels.
• Keep actionable logs visible, including manual migration notices, module lifecycle, durability offset, and actual connection/module-host errors.

Verification

• cargo fmt --all
• LC_ALL=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 LANG=en_US.UTF-8 cargo check -p spacetimedb-client-api -p spacetimedb-core -p spacetimedb-datastore -p spacetimedb-pg
• git diff --check

Note: the first cargo check attempt failed before compiling because the macOS host did not accept C.UTF-8 while configuring vendored OpenSSL through Perl. Rerunning with en_US.UTF-8 passed.