feat(db): add db layer

db.py

@@ -0,0 +1,24 @@
+import sqlite3
+
+
+class DB:
+    def __init__(self, db_path, schema_path="schema.sql", seed_path="seed.sql"):
+        self.con = sqlite3.connect(db_path)
+        self.cur = self.con.cursor()
+        with open(schema_path) as f:
+            self.cur.executescript(f.read())
+
+        with open(seed_path) as f:
+            self.cur.executescript(f.read())
+
+    def __del__(self):
+        self.con.close()
+
+    def query(self, query, params=[]):
+        self.cur.execute(query, params)
+        return self.cur.fetchall()
+
+    def insertDisclosures(self, disclosures):
+        sql = "INSERT INTO disclosures (member_id, filing_year, filing, link) VALUES (?, ?, ?, ?)"
+        self.cur.executemany(sql, disclosures)
+        self.con.commit()