implement graphQL and init postgres

local/graphql/schema/schema.graphql

@@ -0,0 +1,100 @@
+# Minimal GraphQL Schema for Phase 1
+
+# Core Types
+type User {
+  id: String!
+  email: String!
+  fullName: String
+  createdAt: String!
+  updatedAt: String!
+}
+
+type Project {
+  id: String!
+  name: String!
+  description: String
+  ownerId: String!
+  createdAt: String!
+  updatedAt: String!
+}
+
+type Task {
+  id: String!
+  title: String!
+  description: String
+  status: String!
+  priority: String!
+  projectId: String!
+  createdAt: String!
+  updatedAt: String!
+}
+
+# Input Types
+input LoginInput {
+  email: String!
+  password: String!
+}
+
+input UserCreateInput {
+  email: String!
+  fullName: String!
+  password: String!
+}
+
+input ProjectCreateInput {
+  name: String!
+  description: String
+  ownerId: String!
+}
+
+input TaskCreateInput {
+  title: String!
+  description: String
+  status: String
+  priority: String
+  projectId: String!
+}
+
+# Response Types
+type AuthResponse {
+  token: String!
+  user: User!
+}
+
+type MessageResponse {
+  message: String!
+  success: Boolean!
+}
+
+# Queries
+type Query {
+  # Authentication
+  me: User!
+
+  # Users
+  users: [User!]!
+  user(id: String!): User
+
+  # Projects
+  projects: [Project!]!
+  project(id: String!): Project
+
+  # Tasks
+  tasks(projectId: String): [Task!]!
+  task(id: String!): Task
+}
+
+# Mutations
+type Mutation {
+  # Authentication
+  login(input: LoginInput!): AuthResponse!
+
+  # Users
+  createUser(input: UserCreateInput!): User!
+
+  # Projects
+  createProject(input: ProjectCreateInput!): Project!
+
+  # Tasks
+  createTask(input: TaskCreateInput!): Task!
+}