📝 Add docstrings to lio/agent-context-cancel

Docstrings generation was requested by @lionello.

* #1707 (comment)

The following files were modified:

* `src/pkg/migrate/heroku.go`

Author: coderabbitai[bot]

src/pkg/migrate/heroku.go

@@ -273,6 +273,11 @@ func (h *HerokuClient) GetPGInfo(ctx context.Context, addonID string) (PGInfo, e
 	return herokuGet[PGInfo](ctx, h, url)
 }
 
+// herokuGet performs an HTTP GET to the given URL using the HerokuClient's token,
+// decodes the JSON response into a value of type T, and returns that value.
+// The request uses the provided context and sets Heroku-specific Accept and
+// Content-Type headers. If the response has a non-2xx status or the body cannot
+// be decoded as JSON, an error is returned describing the failure.
 func herokuGet[T any](ctx context.Context, h *HerokuClient, url string) (T, error) {
 	req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
 	if err != nil {
@@ -328,6 +333,13 @@ func authenticateHerokuCLI() error {
 	return nil
 }
 
+// getHerokuAuthTokenFromCLI obtains a short-lived Heroku API token by invoking the local Heroku CLI.
+// 
+// It checks that the `heroku` executable is available, ensures the CLI is authenticated, runs
+// `heroku authorizations:create --expires-in=300 --json`, and parses the resulting JSON for the token.
+// 
+// The returned string is the extracted access token. An error is returned if the CLI is not installed,
+// authentication fails, the command cannot be executed, or the command output cannot be parsed.
 func getHerokuAuthTokenFromCLI() (string, error) {
 	_, err := exec.LookPath("heroku")
 	if err != nil {
@@ -400,4 +412,4 @@ func getHerokuAuthToken() (string, error) {
 	}
 
 	return token, nil
-}
+}