Add fleet control: service configs, replica floors, monitor, pause/restart

Central fleet.json sets min/max copies. Tree-node keepFloor respawns
until three healthy unpaused replicas remain. CLI and loopback UI
pause, resume, stop, and restart instances that fail health checks.

scripts/build-docs-site.py

@@ -32,6 +32,7 @@ SECTIONS = [
             ("docs/02-architecture/archive-nats.md", "Archive NATS, bloom, multi-receipt"),
             ("docs/02-architecture/modules-and-nats.md", "Module catalog and NATS addresses"),
             ("docs/02-architecture/tree-nodes.md", "Tree nodes and bulk Merkle summaries"),
+            ("docs/02-architecture/fleet.md", "Fleet replica floors and monitor"),
         ],
     ),
     (
@@ -139,6 +140,7 @@ def main() -> None:
         "verae-tree-node",
         "verae-zapier-simulator",
         "zapier-user-docs",
+        "verae-fleet",
         "docs-master",
     ):
         readme = ROOT / "packages" / pkg / "README.md"
@@ -232,6 +234,7 @@ def main() -> None:
         ("verae-tree-node", "Merkle leaf proofs (bulk summaries)"),
         ("verae-zapier-simulator", "Zapier interface + trace console"),
         ("zapier-user-docs", "Signup-to-usage user guide"),
+        ("verae-fleet", "Service catalog, replica floors, monitor"),
     ]
     git_lis = "".join(
         f'<li><a href="https://git.georgelambert.org/marchon/{name}">{name}</a> '