Added cp leaderboard queries and mutations

.gitignore

@@ -5,3 +5,4 @@ Secrets*.toml
 backups/
 .env
 *.log
+

migrations/20250312124630_add_leaderboard_tables.sql

@@ -0,0 +1,38 @@
+-- Add migration script here
+
+CREATE TABLE IF NOT EXISTS leaderboard (
+    id SERIAL PRIMARY KEY,
+    member_id INT UNIQUE NOT NULL,
+    leetcode_score INT,
+    codeforces_score INT,
+    unified_score INT NOT NULL,
+    last_updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (member_id) REFERENCES member(member_id)
+);
+
+CREATE TABLE IF NOT EXISTS leetcode_stats (
+    id SERIAL PRIMARY KEY,
+    member_id INT NOT NULL,
+    leetcode_username VARCHAR(255) NOT NULL,
+    problems_solved INT NOT NULL,
+    easy_solved INT NOT NULL,
+    medium_solved INT NOT NULL,
+    hard_solved INT NOT NULL,
+    contests_participated INT NOT NULL,
+    best_rank INT NOT NULL,
+    total_contests INT NOT NULL,
+    FOREIGN KEY (member_id) REFERENCES member(member_id)
+);
+
+CREATE TABLE IF NOT EXISTS codeforces_stats (
+    id SERIAL PRIMARY KEY,
+    member_id INT NOT NULL,
+    codeforces_handle VARCHAR(255) NOT NULL,
+    codeforces_rating INT NOT NULL,
+    max_rating INT NOT NULL,
+    contests_participated INT NOT NULL,
+    FOREIGN KEY (member_id) REFERENCES member(member_id)
+);
+
+ALTER TABLE leetcode_stats ADD CONSTRAINT leetcode_stats_member_id_key UNIQUE (member_id);
+ALTER TABLE codeforces_stats ADD CONSTRAINT codeforces_stats_member_id_key UNIQUE (member_id);