feat(api): enhance image module management and export functionality

- Added read-write access to the darktable SQLite catalog for module parameter edits.
- Implemented new endpoints for exporting images and retrieving full-resolution images.
- Introduced PATCH method for updating module parameters with optional preview.
- Added comprehensive tests for new API functionalities, including module retrieval and error handling.
- Updated CORS headers to support new HTTP methods.
- Created detailed documentation for new API endpoints and module operations.

contrib/darktable-api/bruno/modules/Get Module.bru

@@ -0,0 +1,55 @@
+meta {
+  name: Get Module
+  type: http
+  seq: 2
+}
+
+get {
+  url: {{baseUrl}}/api/v1/images/{{imageId}}/modules/filmicrgb
+  body: none
+  auth: bearer
+}
+
+auth:bearer {
+  token: {{accessToken}}
+}
+
+tests {
+  test("returns 200", function() {
+    expect(res.status).to.equal(200);
+  });
+
+  test("operation is filmicrgb", function() {
+    expect(res.body.operation).to.equal("filmicrgb");
+  });
+
+  test("has enabled flag", function() {
+    expect(res.body.enabled).to.be.a("boolean");
+  });
+
+  test("has decoded params", function() {
+    expect(res.body.params).to.be.an("object");
+    expect(res.body.params.grey_point_source).to.be.a("number");
+    expect(res.body.params.black_point_source).to.be.a("number");
+    expect(res.body.params.white_point_source).to.be.a("number");
+    expect(res.body.params.contrast).to.be.a("number");
+    expect(res.body.params.saturation).to.be.a("number");
+  });
+
+  // Save for the Patch Module test
+  bru.setVar("filmicGreyPointSource", res.body.params.grey_point_source);
+}
+
+docs {
+  ## Get Module
+
+  Returns the active history entry for the `filmicrgb` module.
+
+  Change the URL path segment to inspect a different module, e.g.:
+  - `.../modules/exposure`
+  - `.../modules/temperature`
+  - `.../modules/highlights`
+  - `.../modules/channelmixerrgb`
+
+  Returns 404 if the operation has never been added to this image's history.
+}