feat: move migrations

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/post3-server/migrations/20260227000001_multipart_uploads.sql

@@ -0,0 +1,29 @@
+CREATE TABLE multipart_uploads (
+    id           UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    bucket_id    UUID NOT NULL REFERENCES buckets(id) ON DELETE CASCADE,
+    key          TEXT NOT NULL,
+    upload_id    TEXT NOT NULL,
+    content_type TEXT NOT NULL DEFAULT 'application/octet-stream',
+    created_at   TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_multipart_upload_id ON multipart_uploads (upload_id);
+CREATE INDEX idx_multipart_bucket ON multipart_uploads (bucket_id);
+
+CREATE TABLE multipart_upload_metadata (
+    id         UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    upload_id  UUID NOT NULL REFERENCES multipart_uploads(id) ON DELETE CASCADE,
+    meta_key   TEXT NOT NULL,
+    meta_value TEXT NOT NULL
+);
+CREATE UNIQUE INDEX idx_mp_meta_key ON multipart_upload_metadata (upload_id, meta_key);
+
+CREATE TABLE upload_parts (
+    id          UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+    upload_id   UUID NOT NULL REFERENCES multipart_uploads(id) ON DELETE CASCADE,
+    part_number INT NOT NULL,
+    data        BYTEA NOT NULL,
+    size        BIGINT NOT NULL,
+    etag        TEXT NOT NULL,
+    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+CREATE UNIQUE INDEX idx_upload_parts_num ON upload_parts (upload_id, part_number);