fuzz: log corpus size per target and reduce verbose output

Log the number of corpus files before each fuzz target runs, making it
easier to assess whether the 30 second time limit is sufficient to
replay the full corpus. Also remove the -v flag from honggfuzz to cut
down on per-thread status line noise in CI logs.

AI tools were used in preparing this commit.

Author: joostjager

fuzz/ci-fuzz.sh

@@ -33,7 +33,10 @@ cargo --color always hfuzz build -j8
 for TARGET in src/bin/*.rs; do
 	FILENAME=$(basename $TARGET)
 	FILE="${FILENAME%.*}"
-	HFUZZ_RUN_ARGS="--exit_upon_crash -v -n8 --run_time 30"
+	CORPUS_DIR="hfuzz_workspace/$FILE/input"
+	CORPUS_COUNT=$(find "$CORPUS_DIR" -type f 2>/dev/null | wc -l)
+	echo "Fuzzing $FILE (corpus: $CORPUS_COUNT files)"
+	HFUZZ_RUN_ARGS="--exit_upon_crash -n8 --run_time 30"
 	if [ "$FILE" = "chanmon_consistency_target" -o "$FILE" = "fs_store_target" ]; then
 		HFUZZ_RUN_ARGS="$HFUZZ_RUN_ARGS -F 64"
 	fi