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/seed/data/research_projects.json

@@ -0,0 +1,50 @@
+[
+  {
+    "slug": "iot-standards",
+    "title": "AIoT & AI-RAN",
+    "abstract": "AIoT & AI-RAN investigates agent-based IoT architectures in which autonomous AI agents are distributed across sensor, edge, and radio access layers. The project studies agent-to-agent coordination over high-performance transport (gRPC/QUIC) bridged with constrained edge protocols (MQTT/CoAP), targeting AI-RAN designs for distributed autonomous control.",
+    "keywords": [
+      "AIoT",
+      "agent-based IoT",
+      "AI-RAN",
+      "constrained edge protocols",
+      "distributed autonomous control"
+    ],
+    "standardsTrack": "National Research Foundation of Korea (NRF)",
+    "standardsOrg": "NRF",
+    "period": "2026 ~ Present",
+    "deliverables": []
+  },
+  {
+    "slug": "ccis",
+    "title": "MCM",
+    "abstract": "Multilateral and Collaborative Metaverse (MCM) refers to metaverse systems in which two or more participants simultaneously interact within a shared virtual space for a common collaborative purpose. Unlike single-user or purely competitive environments, an MCM service is defined by coordinated participation: its intended outcome cannot be achieved by a single user acting alone. The project defines general requirements, service classification, and a gap analysis against existing standards.",
+    "keywords": [
+      "MCM",
+      "metaverse",
+      "shared virtual space",
+      "coordinated participation",
+      "service classification"
+    ],
+    "standardsTrack": "IEC/TC 100/WG 12 supported by KEIT",
+    "standardsOrg": "IEC TC100",
+    "period": "2026 ~ Present",
+    "deliverables": []
+  },
+  {
+    "slug": "vlc-iot",
+    "title": "MVQM",
+    "abstract": "Management of Visual Quality in Metaverse Systems (MVQM) is a conceptual and functional approach for managing visual quality by dynamically adapting visual data delivery in response to user context, device capability, and network conditions. It emphasizes user-centric, context-aware quality management over static system-centric optimization, covering hybrid visual assets, level of detail, and area of interest adaptation.",
+    "keywords": [
+      "MVQM",
+      "visual quality",
+      "hybrid visual assets",
+      "level of detail",
+      "area of interest"
+    ],
+    "standardsTrack": "IEC/TC 100/WG 12 supported by KEIT",
+    "standardsOrg": "IEC TC100",
+    "period": "2026 ~ Present",
+    "deliverables": []
+  }
+]