fuzz: land the name_validation target (§3.3, wave 7)

fuzz/gen_fuzz_seeds.py

@@ -245,9 +245,77 @@ def every_parse_seeds():
         i += 1
 
 
+def name_validation_seeds():
+    i = 0
+
+    # Plain-content names at the probed lengths: the empty↔one-char
+    # boundary, the pg-identifier (±1) and target-max_len (±1/±2)
+    # neighborhoods. No length cap is pinned; the seeds pin
+    # length-independence of the verdict class.
+    for length in [1, 2, 4, 62, 63, 64, 65, 4095, 4096]:
+        write_seed("name_validation", i, b"a" * length)
+        i += 1
+
+    # Empty and whitespace-only shapes (spaces, tab, newline, mixed,
+    # unicode whitespace) — InvalidName on both kinds.
+    for raw in [b"", b" ", b"  ", b"\t", b"\n", b" \t\n ", b"\xc2\xa0", b"\xe2\x80\x83"]:
+        write_seed("name_validation", i, raw)
+        i += 1
+
+    # The reserved prefix: the boundary form (alone), suffixed, at a
+    # boundary length, and the one v1-reserved string.
+    for raw in [
+        b"__alkstore_",
+        b"__alkstore_x",
+        b"__alkstore_" + b"a" * 63,
+        b"__alkstore_listener_reconnected__",
+    ]:
+        write_seed("name_validation", i, raw)
+        i += 1
+
+    # Prefix near-misses: casing deviations, the missing trailing
+    # underscore, embedded and whitespace-led forms — the pinned rule
+    # is byte-exact and leading-only, so these must accept.
+    for raw in [
+        b"__ALKSTORE_x",
+        b"__Alkstore_x",
+        b"__alkStore_x",
+        b"__alkstore",
+        b"x__alkstore_y",
+        b" __alkstore_x",
+        b"__alkstore_ ",
+    ]:
+        write_seed("name_validation", i, raw)
+        i += 1
+
+    # Whitespace-only and reserved-prefixed at the pg-identifier
+    # neighborhood lengths (±1, ±2).
+    for length in [62, 63, 64, 65]:
+        write_seed("name_validation", i, b" " * length)
+        i += 1
+        write_seed("name_validation", i, b"__alkstore_" + b"a" * (length - len(b"__alkstore_")))
+        i += 1
+
+    # Unicode and control-char shapes, including invalid UTF-8 (lossy
+    # decode) and embedded NUL.
+    for raw in [
+        "é-😀-名前".encode(),
+        "\u00e9\u0301".encode(),
+        b"\x00\x01\x02",
+        b"a\x00b",
+        b"tab\tname",
+        b"\x7f",
+        b"\xc3\x28",
+        b"\xff\xfe",
+    ]:
+        write_seed("name_validation", i, raw)
+        i += 1
+
+
 def main():
     payload_codec_seeds()
     every_parse_seeds()
+    name_validation_seeds()
 
 
 if __name__ == "__main__":