feature: tag from ci fetches commits from remote api

src/git_flow/remote/base.py

@@ -1,9 +1,10 @@
 from abc import ABC, abstractmethod
 
 import giturlparse
+import requests
 
 from git_flow import SUPPORTED_REMOTE_URL_SCHEMAS, GitFlowError
-from git_flow.git import Git
+from git_flow.git import Commit, Git
 
 
 class RemoteAPI(ABC):
@@ -65,6 +66,12 @@ class RemoteAPI(ABC):
     def create_tag(self, tag: str, commit: str) -> str:
         pass
 
+    @abstractmethod
+    def get_merge_commits(self, merge_commit: str) -> list[Commit]:
+        """Busca el PR que generó el merge commit y devuelve sus commits (del más nuevo al más
+        viejo), sin depender del historial local."""
+        pass
+
     @abstractmethod
     def get_endpoint(self, resource: str) -> str:
         pass
@@ -75,3 +82,25 @@ class RemoteAPI(ABC):
             "Content-Type": "application/json",
             "Authorization": "Bearer " + self.token,
         }
+
+    def get_json(self, url: str, params: dict | None = None):
+        response = requests.get(url, headers=self.get_headers(), params=params)
+
+        if not response.ok:
+            raise GitFlowError(f"Ocurrió un error al consultar {url}: {response.text}")
+
+        return response
+
+    def get_all_pages(self, url: str, page_size: int = 50) -> list:
+        """Recorre un endpoint paginado por número de página (page / per_page)."""
+        items: list = []
+        page = 1
+
+        while True:
+            batch = self.get_json(url, {"page": page, "per_page": page_size}).json()
+            items += batch
+
+            if len(batch) < page_size:
+                return items
+
+            page += 1