First pass implementation of an SQLite backing store for fetched opportunities

internal/store/migrations/00007_create_opportunity_marks.sql

@@ -0,0 +1,22 @@
+-- +goose Up
+-- +goose StatementBegin
+CREATE TABLE IF NOT EXISTS "opportunity_marks" (
+	"uuid" TEXT NOT NULL UNIQUE,
+  "hidden" BOOLEAN NOT NULL DEFAULT 0,
+  "skipped" BOOLEAN NOT NULL DEFAULT 0,
+  "interested" BOOLEAN NOT NULL DEFAULT 0,
+  "bid_submitted" BOOLEAN NOT NULL DEFAULT 0,
+  "lost" BOOLEAN NOT NULL DEFAULT 0,
+  "won" BOOLEAN NOT NULL DEFAULT 0,
+	CHECK (NOT ("won" AND "lost")),
+	PRIMARY KEY ("uuid"),
+	FOREIGN KEY ("uuid")
+		REFERENCES "opportunities" ("uuid")
+		ON DELETE CASCADE
+);
+-- +goose StatementEnd
+
+-- +goose Down
+-- +goose StatementBegin
+DROP TABLE IF EXISTS "opportunity_marks";
+-- +goose StatementEnd