nisse-review: later reviews, replies, rounds, stop and review (M7.5)

Back on a PR it reviewed: a new head gets a later review of the commits
since (each one's diff, through the API) and of its earlier points; what
was said since gets replies, answered where it was said or skipped with a
reason. It signs off once and stays quiet while still happy. Past
tuning.review.max_rounds it sums up for the operator and goes quiet,
until a push or someone other than the PR's author joins in. An
operator's `stop` quiets it; `review` asks for a fresh review.

Reviews carry numbered markers and replies their point's key, so
recovery posts nothing twice.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J5Utyfzw7gF7UhjRDEtjTk

tests/integration/test_review_live.py

@@ -1,11 +1,13 @@
 """nisse-review against the real services (Part R, M7.3): a PR in a fresh
 test repository gets one COMMENT review from the review account, by the
-local model; an account that could write to a repository is refused.
+local model, and after a push and a question, a later review at the new
+head (M7.5); an account that could write to a repository is refused.
 
 Needs NISSE_REVIEW_GITEA_TOKEN, the review account's token (CI secret; .env
 locally), besides what every live test needs.
 """
 
+import base64
 import io
 import os
 import uuid
@@ -21,10 +23,14 @@ from nisse_review.build import StartupError, build
 from nisse_review.config import ReviewConfig
 from nisse_review.review import marker
 
-# Smoke: every PR runs it (about a minute on the local model), the only
+# Smoke: every PR runs it (two reviews on the local model), the only
 # check that the review account, its token and its read-only refusal work.
 pytestmark = [pytest.mark.integration, pytest.mark.e2e, pytest.mark.smoke]
 
+TEST_SHOUT = (
+    "from shout import shout\n\n\ndef test_shout():\n    assert shout('hi') == 'HI!'\n"
+)
+
 
 def review_gitea(url: str) -> GiteaClient:
     token = os.environ.get("NISSE_REVIEW_GITEA_TOKEN", "")
@@ -87,12 +93,32 @@ def test_a_ready_pr_gets_one_comment_review(
         try:
             assert built.scheduler.round() is True
             assert built.scheduler.round() is False  # reviewed once, not again
+            first = operator.pull_request(repo.name, pr.number).head_sha
+            mine = [
+                r for r in operator.reviews(repo.name, pr.number) if r.author == account
+            ]
+            assert len(mine) == 1
+            assert mine[0].state == "COMMENT" and mine[0].commit == first
+            assert marker(first) in mine[0].body
+            # M7.5: a push and a question get a later review of what changed.
+            operator._request(
+                "POST",
+                f"/repos/{repo.name}/contents/sandbox/test_shout.py",
+                json={
+                    "content": base64.b64encode(TEST_SHOUT.encode()).decode(),
+                    "message": "Test shout",
+                    "branch": "shout",
+                },
+            )
+            operator.post_comment(repo.name, pr.number, "I added a test. Is it enough?")
+            assert built.scheduler.round() is True
         finally:
             built.store.close()
-        head = operator.pull_request(repo.name, pr.number).head_sha
-        mine = [
-            r for r in operator.reviews(repo.name, pr.number) if r.author == account
+        second = operator.pull_request(repo.name, pr.number).head_sha
+        assert second != first
+        later = [
+            r
+            for r in operator.reviews(repo.name, pr.number)
+            if r.author == account and marker(second, 2) in r.body
         ]
-        assert len(mine) == 1
-        assert mine[0].state == "COMMENT" and mine[0].commit == head
-        assert marker(head) in mine[0].body
+        assert len(later) == 1 and later[0].commit == second