fix(db): improve database connection handling and reconnection logic

* Added a database factory function to allow reconnection when the database is closed.
* Implemented mutex locks for safe concurrent access to the database connection.
* Updated all database query methods to handle reconnection attempts on closed connections.
* Enhanced error handling for database operations across multiple providers.

pkg/common/adapters/database/bun.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"reflect"
 	"strings"
+	"sync"
 	"time"
 
 	"github.com/uptrace/bun"
@@ -95,6 +96,8 @@ func debugScanIntoStruct(rows interface{}, dest interface{}) error {
 // This demonstrates how the abstraction works with different ORMs
 type BunAdapter struct {
 	db         *bun.DB
+	dbMu       sync.RWMutex
+	dbFactory  func() (*bun.DB, error)
 	driverName string
 }
 
@@ -106,10 +109,36 @@ func NewBunAdapter(db *bun.DB) *BunAdapter {
 	return adapter
 }
 
+// WithDBFactory configures a factory used to reopen the database connection if it is closed.
+func (b *BunAdapter) WithDBFactory(factory func() (*bun.DB, error)) *BunAdapter {
+	b.dbFactory = factory
+	return b
+}
+
+func (b *BunAdapter) getDB() *bun.DB {
+	b.dbMu.RLock()
+	defer b.dbMu.RUnlock()
+	return b.db
+}
+
+func (b *BunAdapter) reconnectDB() error {
+	if b.dbFactory == nil {
+		return fmt.Errorf("no db factory configured for reconnect")
+	}
+	newDB, err := b.dbFactory()
+	if err != nil {
+		return err
+	}
+	b.dbMu.Lock()
+	b.db = newDB
+	b.dbMu.Unlock()
+	return nil
+}
+
 // EnableQueryDebug enables query debugging which logs all SQL queries including preloads
 // This is useful for debugging preload queries that may be failing
 func (b *BunAdapter) EnableQueryDebug() {
-	b.db.AddQueryHook(&QueryDebugHook{})
+	b.getDB().AddQueryHook(&QueryDebugHook{})
 	logger.Info("Bun query debug mode enabled - all SQL queries will be logged")
 }
 
@@ -130,22 +159,22 @@ func (b *BunAdapter) DisableQueryDebug() {
 
 func (b *BunAdapter) NewSelect() common.SelectQuery {
 	return &BunSelectQuery{
-		query:      b.db.NewSelect(),
+		query:      b.getDB().NewSelect(),
 		db:         b.db,
 		driverName: b.driverName,
 	}
 }
 
 func (b *BunAdapter) NewInsert() common.InsertQuery {
-	return &BunInsertQuery{query: b.db.NewInsert()}
+	return &BunInsertQuery{query: b.getDB().NewInsert()}
 }
 
 func (b *BunAdapter) NewUpdate() common.UpdateQuery {
-	return &BunUpdateQuery{query: b.db.NewUpdate()}
+	return &BunUpdateQuery{query: b.getDB().NewUpdate()}
 }
 
 func (b *BunAdapter) NewDelete() common.DeleteQuery {
-	return &BunDeleteQuery{query: b.db.NewDelete()}
+	return &BunDeleteQuery{query: b.getDB().NewDelete()}
 }
 
 func (b *BunAdapter) Exec(ctx context.Context, query string, args ...interface{}) (res common.Result, err error) {
@@ -154,7 +183,14 @@ func (b *BunAdapter) Exec(ctx context.Context, query string, args ...interface{}
 			err = logger.HandlePanic("BunAdapter.Exec", r)
 		}
 	}()
-	result, err := b.db.ExecContext(ctx, query, args...)
+	var result sql.Result
+	run := func() error { var e error; result, e = b.getDB().ExecContext(ctx, query, args...); return e }
+	err = run()
+	if isDBClosed(err) {
+		if reconnErr := b.reconnectDB(); reconnErr == nil {
+			err = run()
+		}
+	}
 	return &BunResult{result: result}, err
 }
 
@@ -164,11 +200,17 @@ func (b *BunAdapter) Query(ctx context.Context, dest interface{}, query string,
 			err = logger.HandlePanic("BunAdapter.Query", r)
 		}
 	}()
-	return b.db.NewRaw(query, args...).Scan(ctx, dest)
+	err = b.getDB().NewRaw(query, args...).Scan(ctx, dest)
+	if isDBClosed(err) {
+		if reconnErr := b.reconnectDB(); reconnErr == nil {
+			err = b.getDB().NewRaw(query, args...).Scan(ctx, dest)
+		}
+	}
+	return err
 }
 
 func (b *BunAdapter) BeginTx(ctx context.Context) (common.Database, error) {
-	tx, err := b.db.BeginTx(ctx, &sql.TxOptions{})
+	tx, err := b.getDB().BeginTx(ctx, &sql.TxOptions{})
 	if err != nil {
 		return nil, err
 	}
@@ -194,7 +236,7 @@ func (b *BunAdapter) RunInTransaction(ctx context.Context, fn func(common.Databa
 			err = logger.HandlePanic("BunAdapter.RunInTransaction", r)
 		}
 	}()
-	return b.db.RunInTx(ctx, &sql.TxOptions{}, func(ctx context.Context, tx bun.Tx) error {
+	return b.getDB().RunInTx(ctx, &sql.TxOptions{}, func(ctx context.Context, tx bun.Tx) error {
 		// Create adapter with transaction
 		adapter := &BunTxAdapter{tx: tx, driverName: b.driverName}
 		return fn(adapter)
@@ -202,7 +244,7 @@ func (b *BunAdapter) RunInTransaction(ctx context.Context, fn func(common.Databa
 }
 
 func (b *BunAdapter) GetUnderlyingDB() interface{} {
-	return b.db
+	return b.getDB()
 }
 
 func (b *BunAdapter) DriverName() string {