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/publications.go

@@ -0,0 +1,30 @@
+package models
+
+import "time"
+
+type Publication struct {
+	ID          int       `json:"id"`
+	Category    string    `json:"category"`
+	Title       string    `json:"title"`
+	Authors     *string   `json:"authors,omitempty"`
+	Venue       string    `json:"venue"`
+	Volume      *string   `json:"volume,omitempty"`
+	PublishedAt string    `json:"published_at"`
+	KCI         bool      `json:"kci"`
+	DOI         *string   `json:"doi,omitempty"`
+	IsHighlight bool      `json:"is_highlight"`
+	CreatedAt   time.Time `json:"created_at"`
+}
+
+type Patent struct {
+	ID             int       `json:"id"`
+	Title          string    `json:"title"`
+	Inventors      string    `json:"inventors"`
+	ApplicationNo  string    `json:"application_no"`
+	ApplicationAt  string    `json:"application_at"`
+	RegistrationNo *string   `json:"registration_no,omitempty"`
+	RegistrationAt *string   `json:"registration_at,omitempty"`
+	Country        string    `json:"country"`
+	PublishedAt    string    `json:"published_at"`
+	CreatedAt      time.Time `json:"created_at"`
+}