Create tables for runs and measurements

migrations/20230809141314_runs.sql

@@ -0,0 +1,18 @@
+CREATE TABLE runs (
+    id   TEXT NOT NULL PRIMARY KEY,
+    hash TEXT NOT NULL,
+
+    FOREIGN KEY (hash) REFERENCES commits (hash) ON DELETE CASCADE
+) STRICT;
+
+CREATE TABLE measurements (
+    id        TEXT NOT NULL,
+    name      TEXT NOT NULL,
+    value     REAL NOT NULL,
+    stddev    REAL,
+    unit      TEXT,
+    direction INT,
+
+    PRIMARY KEY (id, name),
+    FOREIGN KEY (id) REFERENCES runs (id) ON DELETE CASCADE
+) STRICT;