Projects as configuration entries (M1.4, D8)

- Config: `projects: {name: entry}` with repo, base_branch, workspace,
  build_host, push credential, labels (defaults added to every issue),
  secrets by ${VAR} reference with visibility (commands | harness), and
  egress (recorded, not enforced). Every problem in every entry is
  reported at once; an inline secret, a bad visibility, a repeated repo or
  a non-slug name is an error.
- The old loop runs exactly one project (only_project) and refuses more.
- The new loop is per project: each its own clone, workspace (with its
  commands-visible secrets, redacted on return), push credential and
  milestones; intake polls every project's repository; items are scoped
  to their project for every run, publish and PR watch. Issues are named
  project#14 when there is more than one project, and a bare #14 that
  matches two is asked about. Switching projects parks the one worked on
  last (all others after a boot).
- A restatement that ends in a question is sent back to the driver, not
  posted: the e2e driver kept asking "Is this the right interpretation?",
  which a plain yes can't answer.

Tests: config entries and errors, two-project assembly, two-project loop
tests (intake, own workspaces and repos, #14 in both, do-next, label
defaults, parking across projects), the property walk over two projects
with a new own_repository_only property (an item using the first
project's repo fails 15 of 16 seeds), and the restatement check.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPQ14L3LikyefCMFBqEbKE

nisse-dev/tests/test_loop_labels.py

@@ -280,3 +280,32 @@ def _msg(text: str, thread: str) -> Any:
     from nisse_dev.transport import InboundMessage
 
     return InboundMessage(DON, text, thread=thread)
+
+
+def test_a_restatement_that_asks_is_sent_back(tmp_path: Path) -> None:
+    """A restatement is agreed to as it stands; one ending in a question
+    (models add "Is this right?") never goes up."""
+    h = Harness(
+        tmp_path,
+        ScriptedModel(
+            [call("restate", text="I'll add count_words. Is this right?")],
+            [call("restate", text="I'll add count_words to text.py, with tests.")],
+        ),
+        FakeGitea(issue()),
+    )
+    h.agent.intake()
+    loop = loop_of(h.item())
+    assert (loop.wait, loop.rev) == (GO_AHEAD, 1)
+    posted = [p for p in h.posted() if p.startswith("rev-")]
+    assert posted == [
+        (
+            "rev-1: I'll add count_words to text.py, with tests.\n\n"
+            "Say go to start, or reply with changes."
+        )
+    ]
+    results = [
+        e.event.result
+        for e in h.store.transcript(h.item().id, "driver").read()
+        if hasattr(e.event, "result")
+    ]
+    assert any("a restatement asks no questions" in r for r in results)