feat(backend,docker,docs): implement Go/Gin/SQLite REST API server, Docker containerization, and architecture specifications

- Implement standalone Go backend API server using Gin and pure-Go SQLite (modernc.org/sqlite)
- Add 11-table schema DDL migrations (000001_init.up.sql) based on DATA_TABLE.md
- Add seed data ingestion tool (cmd/seed) and static TypeScript content exporter (cmd/export-content)
- Add configuration loader (internal/config) supporting environment variables and .env files (HOST, PORT, DB_PATH, GIN_MODE, CORS_ALLOW_ORIGINS, AUTO_MIGRATE)
- Add lightweight multi-stage Dockerfile and docker-compose.yml with persistent SQLite volume
- Add comprehensive architecture specification (ARCHITECTURE.md) and REST API interface specification (API_INTERFACE.md)
- Harmonize frontend publications page to consume isHighlight flag from database-synced content

backend/internal/models/members.go

@@ -0,0 +1,26 @@
+package models
+
+import "time"
+
+type Member struct {
+	ID           int       `json:"id"`
+	NameKo       string    `json:"name_ko"`
+	NameEn       string    `json:"name_en"`
+	Degree       string    `json:"degree"`
+	Affiliation  *string   `json:"affiliation,omitempty"`
+	Email        *string   `json:"email,omitempty"`
+	IsAdvisor    bool      `json:"is_advisor"`
+	DisplayOrder int       `json:"display_order"`
+	CreatedAt    time.Time `json:"created_at"`
+}
+
+type Alumnus struct {
+	ID              int       `json:"id"`
+	NameKo          string    `json:"name_ko"`
+	NameEn          string    `json:"name_en"`
+	Degree          string    `json:"degree"`
+	GraduatedAt     string    `json:"graduated_at"`
+	Major           *string   `json:"major,omitempty"`
+	CurrentPosition *string   `json:"current_position,omitempty"`
+	CreatedAt       time.Time `json:"created_at"`
+}