Two SSRF hardenings on top of the private-network deployment mode:
1. Redirect / subresource re-validation. The SSRF guard previously ran only on
the initial navigation URL in the tool layer, so a public page that 302s to
169.254.169.254 (or a script fetch / img to a metadata IP) reached the target
unchecked — worse now that private-network mode exists. Install a per-context
request interceptor (BrowserLauncher.applyContextDefaults) that re-runs
UrlSafetyChecker on every http(s) request and aborts blocked ones. Non-network
schemes (data:/blob:/about:) pass through; unexpected checker faults fail open
so a transient error cannot wedge the page (the initial URL was already checked).
2. Allowlist can no longer open a cloud-metadata endpoint. Metadata hostnames and
IPs are now checked BEFORE the allowlist short-circuits, so an operator entry
like 169.254.0.0/16 or metadata.google.internal can never expose instance
metadata. Ordinary private-host allowlisting is unaffected (regression-tested).
Also correct the 192.0.0.192 comment (Oracle Cloud IMDS, not Azure).
The PRIVATE_ITEMS list contained the bare 'test' entry, which rsync
interprets as 'any directory named test at any depth' — so it caught
the root-level /test/ scratch directory (intended) AND every src/test/
under each module (not intended).
Pattern is already anchored to /test (root-only). This commit rsyncs
the accumulated src/test/ tree forward so opensource has the unit tests
that have been written / updated against existing src/main/ code since
the pattern regression. Going forward each per-commit sync will carry
src/test/ files along with the main change.