fix: add pulses to db and changes date to timestamp to allow granularity

app/consumer/initdb/01_schema.sql

@@ -28,7 +28,8 @@ CREATE TABLE IF NOT EXISTS "user" (
 CREATE TABLE IF NOT EXISTS "reading" (
 	"reading_id" UUID NOT NULL DEFAULT uuidv7(),
 	"device_id" UUID NOT NULL,
-	"date" DATE NOT NULL,
+	"date" TIMESTAMP NOT NULL,
+	"pulses" INTEGER NOT NULL,
 	PRIMARY KEY("reading_id")
 );