PostgreSQL 의존성 및 내부 유틸리티 추가:

- `github.com/lib/pq` PostgreSQL 드라이버 vendor 디렉토리에 추가.
- PostgreSQL 관련 내부 패키지(`pqsql`, `proto`, `pqtime`, `pgpass`, `pgservice`, `pqutil`) 구현:
  - SQL 어휘 처리, 프로토콜 상수 및 구조 정의, 시간 파서/포맷터(`Parse`, `Format`).
  - `.pgpass` 파일 및 `pg_service.conf` 관리 기능 추가.
  - 파일/사용자 권한 검증 및 플랫폼별 사용자 정보 조회 기능 포함.
- 데이터베이스 초기화 로직 추가 (`services/db.go`):
  - PostgreSQL 연결 설정 및 초기 스키마 생성.
- 자동매매 관련 DB 레포지토리(`services/autotrade_repo.go`) 구현:
  - 자동매매 규칙 및 포지션 관리 로직 추가 (`dbInsertRule`, `dbLoadRules` 등).

vendor/github.com/lib/pq/notice.go

@@ -0,0 +1,69 @@
+package pq
+
+import (
+	"context"
+	"database/sql/driver"
+)
+
+// NoticeHandler returns the notice handler on the given connection, if any. A
+// runtime panic occurs if c is not a pq connection. This is rarely used
+// directly, use [ConnectorNoticeHandler] and [ConnectorWithNoticeHandler] instead.
+func NoticeHandler(c driver.Conn) func(*Error) {
+	return c.(*conn).noticeHandler
+}
+
+// SetNoticeHandler sets the given notice handler on the given connection. A
+// runtime panic occurs if c is not a pq connection. A nil handler may be used
+// to unset it. This is rarely used directly, use ConnectorNoticeHandler and
+// [ConnectorWithNoticeHandler] instead.
+//
+// Note: Notice handlers are executed synchronously by pq meaning commands
+// won't continue to be processed until the handler returns.
+func SetNoticeHandler(c driver.Conn, handler func(*Error)) {
+	c.(*conn).noticeHandler = handler
+}
+
+// NoticeHandlerConnector wraps a regular connector and sets a notice handler
+// on it.
+type NoticeHandlerConnector struct {
+	driver.Connector
+	noticeHandler func(*Error)
+}
+
+// Connect calls the underlying connector's connect method and then sets the
+// notice handler.
+func (n *NoticeHandlerConnector) Connect(ctx context.Context) (driver.Conn, error) {
+	c, err := n.Connector.Connect(ctx)
+	if err == nil {
+		SetNoticeHandler(c, n.noticeHandler)
+	}
+	return c, err
+}
+
+// ConnectorNoticeHandler returns the currently set notice handler, if any. If
+// the given connector is not a result of [ConnectorWithNoticeHandler], nil is
+// returned.
+func ConnectorNoticeHandler(c driver.Connector) func(*Error) {
+	if c, ok := c.(*NoticeHandlerConnector); ok {
+		return c.noticeHandler
+	}
+	return nil
+}
+
+// ConnectorWithNoticeHandler creates or sets the given handler for the given
+// connector. If the given connector is a result of calling this function
+// previously, it is simply set on the given connector and returned. Otherwise,
+// this returns a new connector wrapping the given one and setting the notice
+// handler. A nil notice handler may be used to unset it.
+//
+// The returned connector is intended to be used with database/sql.OpenDB.
+//
+// Note: Notice handlers are executed synchronously by pq meaning commands
+// won't continue to be processed until the handler returns.
+func ConnectorWithNoticeHandler(c driver.Connector, handler func(*Error)) *NoticeHandlerConnector {
+	if c, ok := c.(*NoticeHandlerConnector); ok {
+		c.noticeHandler = handler
+		return c
+	}
+	return &NoticeHandlerConnector{Connector: c, noticeHandler: handler}
+}