wip: pause checkpoint — P6 feature complete, gate interrupted (not for merge)

fuzz/fuzz_targets/fuzz_extract_pdf.rs

@@ -0,0 +1,17 @@
+//! The PDF extractor on arbitrary bytes (plan P6): reading text, a page's
+//! pixels and the page count is a refusal or an answer, never a panic or a
+//! hang (D-32: it runs in the server's process).
+#![no_main]
+
+use libfuzzer_sys::fuzz_target;
+
+fuzz_target!(|data: &[u8]| {
+    let _ = ledger_import::extract::pdf_text(data);
+    let _ = ledger_import::extract::pdf_lines(data);
+    if let Ok(pages) = ledger_import::extract::page_count(data) {
+        for page in [0, pages.saturating_sub(1), pages] {
+            let _ = ledger_import::extract::page_png(data, page, 64);
+        }
+    }
+    let _ = ledger_import::extract::text_of(data, "application/pdf", "receipt.pdf");
+});