feat: add Postgres support for PO code generation, upgrade crypto deps, and optimize multipart logging

• Add --driver flag (mysql/postgres) to new-po command with Postgres type mapping
  using information_schema + pg_description for columns and primary keys
• Switch dial() to gorm dialector, fixing 'unknown driver postgres' error
• Unify type mapping via Generate.goType helper across mysql, postgres, and JSON paths
• Parameterize table filter queries to prevent SQL injection
• Drop unused Nullable scan and dead code in JSONFile branch
• Upgrade golang.org/x/crypto from v0.45.0 to v0.52.0 to fix multiple security
  vulnerabilities (#27, #29, #30, #31, #33, #34, #35, #36, #38, #39)
• Update transitive dependencies: x/net v0.47.0->v0.54.0, x/sync v0.18.0->v0.20.0,
  x/sys v0.38.0->v0.45.0, x/text v0.31.0->v0.37.0
• Skip reading request body for multipart/form-data uploads to avoid large binary
  memory load and garbled log output

implement Do() method for Request interface

refactor(kafka): improve worker pool implementation

fix: add timeout to Redis ping in project template

refactor ListenEvent to support per-topic sequential/concurrent processing

refactor ListenEvent to support per-topic sequential/concurrent processing

Conventional optimization and iteration

Fix errors and upgrade dependency versions

Update scaffolding

optimization framework.