policy/v2: add policytester captures recorded from Tailscale SaaS

57 captures covering the alias × outcome matrix for the tests block,
recorded against a real Tailscale SaaS tailnet. Replayed by
TestPolicyTesterCompat.

Bump the check-added-large-files pre-commit threshold to 1024 KB —
captures include verbose per-node netmaps and one is 620 KB.

Updates #1803

.pre-commit-config.yaml

@@ -13,6 +13,7 @@ repos:
     rev: v6.0.0
     hooks:
       - id: check-added-large-files
+        args: [--maxkb=1024]
       - id: check-case-conflict
       - id: check-executables-have-shebangs
       - id: check-json