feat: scaffold centralized Spring Boot backend project

backend/src/main/resources/application.properties

@@ -0,0 +1,13 @@
+# ─── DATABASE CONNECTION CONFIGURATION ───
+spring.datasource.url=jdbc:postgresql://localhost:5432/rit_freshers_hub?sslmode=disable
+spring.datasource.username=postgres
+spring.datasource.password=your_local_postgres_password_here
+
+# ─── JPA / HIBERNATE SETTINGS ───
+spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.hibernate.ddl-auto=validate
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.format_sql=true
+
+# ─── SERVER PORT ───
+server.port=8080