fix: remove sensitive info of dsn (#51)

* fix: remove sensitive info of dsn

* handle postgres dsn format `key=value`

* Try recovering previous context

* Clean up

* Run gofmt

* Add context restoration tests

* feat: add option to exclude server address attribute

* chore: formating tracing_test.go

support semconv v1.30 (#44)

* feat: merge go modules

* chore: upgrade metric version

* chore: update demo module version

allow additional metric configuration in ReportDBStatsMetrics (#33)

Merge pull request #32 from zstone12/feat/slog

feat/slog

fix: prepared statements enabled cause metrcis not work (#31)

feat: add spanner db support (#29)