Fix flaky unit test on merge-triggered CI runs (#7)

- entrypoint.sh: bound the target connectivity check with `-w 2` (the only unbounded step in the startup path)
- tests/entrypoint.bats: widen wait_for_log's budget from 5s to 10s

Merge-triggered runs land on a colder runner (Docker cache evicted by other repos' scheduled jobs since the PR was last tested) than PR-check runs, and the first backgrounded entrypoint.sh in the suite was occasionally landing just past the old 5s window — always passed on rerun once warm.

entrypoint.sh

@@ -145,7 +145,7 @@ fi
 
 log "[~] Testing connection to target..."
 # Test if we can reach the target before starting socat
-if ! nc -z "$TARGET_HOST" "$TARGET_PORT" 2>/dev/null; then
+if ! nc -z -w 2 "$TARGET_HOST" "$TARGET_PORT" 2>/dev/null; then
     log "[!] Cannot connect to $TARGET_HOST:$TARGET_PORT - socat will retry automatically"
 else
     log "[✓] Connection to $TARGET_HOST:$TARGET_PORT is working"