refactor: move db dir into server

server/db/schema.sql

@@ -0,0 +1,51 @@
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    username VARCHAR(255) NOT NULL UNIQUE,
+    email VARCHAR(255) NOT NULL UNIQUE,
+    password_hash VARCHAR(255) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+CREATE TABLE datasets (
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER NOT NULL,
+    name VARCHAR(255) NOT NULL,
+    description TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    topics JSONB,
+    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+);
+
+CREATE TABLE events (
+    /* Required Fields */
+    id SERIAL PRIMARY KEY,
+    dataset_id INTEGER NOT NULL,
+    type VARCHAR(255) NOT NULL,
+
+    author VARCHAR(255) NOT NULL,
+    content TEXT NOT NULL,
+    timestamp BIGINT NOT NULL,
+    date DATE NOT NULL,
+    dt TIMESTAMP NOT NULL,
+    hour INTEGER NOT NULL,
+    weekday VARCHAR(255) NOT NULL,
+
+    /* Comments and Replies */
+    parent_id VARCHAR(255),
+    reply_to VARCHAR(255),
+    source VARCHAR(255) NOT NULL,
+
+    /* NLP Fields */
+    topic VARCHAR(255),
+    topic_confidence FLOAT,
+
+    ner_entities JSONB,
+
+    emotion_anger FLOAT,
+    emotion_disgust FLOAT,
+    emotion_fear FLOAT,
+    emotion_joy FLOAT,
+    emotion_sadness FLOAT,
+
+    FOREIGN KEY (dataset_id) REFERENCES datasets(id) ON DELETE CASCADE
+);