Add WHOOSH search service with BACKBEAT integration

Complete implementation:
- Go-based search service with PostgreSQL and Redis backend
- BACKBEAT SDK integration for beat-aware search operations
- Docker containerization with multi-stage builds
- Comprehensive API endpoints for project analysis and search
- Database migrations and schema management
- GITEA integration for repository management
- Team composition analysis and recommendations

Key features:
- Beat-synchronized search operations with timing coordination
- Phase-based operation tracking (started → querying → ranking → completed)
- Docker Swarm deployment configuration
- Health checks and monitoring
- Secure configuration with environment variables

Architecture:
- Microservice design with clean API boundaries
- Background processing for long-running analysis
- Modular internal structure with proper separation of concerns
- Integration with CHORUS ecosystem via BACKBEAT timing

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/database/migrations.go

@@ -0,0 +1,62 @@
+package database
+
+import (
+	"fmt"
+
+	"github.com/golang-migrate/migrate/v4"
+	"github.com/golang-migrate/migrate/v4/database/postgres"
+	_ "github.com/golang-migrate/migrate/v4/source/file"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/stdlib"
+	"github.com/rs/zerolog/log"
+)
+
+func RunMigrations(databaseURL string) error {
+	// Open database connection for migrations
+	config, err := pgx.ParseConfig(databaseURL)
+	if err != nil {
+		return fmt.Errorf("failed to parse database config: %w", err)
+	}
+	
+	db := stdlib.OpenDB(*config)
+	defer db.Close()
+
+	driver, err := postgres.WithInstance(db, &postgres.Config{})
+	if err != nil {
+		return fmt.Errorf("failed to create postgres driver: %w", err)
+	}
+
+	m, err := migrate.NewWithDatabaseInstance(
+		"file://migrations",
+		"postgres",
+		driver,
+	)
+	if err != nil {
+		return fmt.Errorf("failed to create migrate instance: %w", err)
+	}
+
+	version, dirty, err := m.Version()
+	if err != nil && err != migrate.ErrNilVersion {
+		return fmt.Errorf("failed to get migration version: %w", err)
+	}
+
+	log.Info().
+		Uint("current_version", version).
+		Bool("dirty", dirty).
+		Msg("Current migration status")
+
+	if err := m.Up(); err != nil && err != migrate.ErrNoChange {
+		return fmt.Errorf("failed to run migrations: %w", err)
+	}
+
+	newVersion, _, err := m.Version()
+	if err != nil {
+		return fmt.Errorf("failed to get new migration version: %w", err)
+	}
+
+	log.Info().
+		Uint("new_version", newVersion).
+		Msg("Migrations completed")
+
+	return nil
+}