copy_fail_family: skip DIRTYFAIL typed prompt under --i-know

The vendored DIRTYFAIL exploits call typed_confirm("DIRTYFAIL"), which
reads stdin interactively. SKELETONKEY already gates --exploit/--auto
behind --i-know, so the prompt is redundant and deadlocks non-interactive
runs like `skeletonkey --auto --i-know`.

Add a dirtyfail_assume_yes flag, forwarded from skeletonkey_ctx.authorized
by the bridge layer's apply_ctx(). When set, typed_confirm() auto-satisfies
its gate and logs that it did so.

The YES_BREAK_SSH self-lockout guard is exempt — it protects the
operator's own access rather than gating authorization, so it still
requires an interactive answer.

Standalone DIRTYFAIL builds are unchanged: the flag defaults false.

modules/copy_fail_family/src/common.h

@@ -86,6 +86,14 @@ extern bool dirtyfail_no_revert;
  * is redirected to stderr. Set by --json. */
 extern bool dirtyfail_json;
 
+/* When true, typed_confirm() auto-satisfies its gate instead of reading
+ * stdin — the caller has already cleared an explicit authorization gate.
+ * SKELETONKEY's bridge layer sets this from skeletonkey_ctx.authorized
+ * (i.e. the --i-know flag) so non-interactive runs like
+ * `skeletonkey --auto --i-know` don't deadlock on the DIRTYFAIL prompt.
+ * The YES_BREAK_SSH self-lockout guard is exempt — see typed_confirm(). */
+extern bool dirtyfail_assume_yes;
+
 void log_step (const char *fmt, ...) __attribute__((format(printf, 1, 2)));
 void log_ok   (const char *fmt, ...) __attribute__((format(printf, 1, 2)));
 void log_bad  (const char *fmt, ...) __attribute__((format(printf, 1, 2)));