lint: wrap long lines (E501), fix F841/F821/E731 — make check fully green

All 32 findings resolved: regex literals kept single-line with noqa
(pattern IS the reviewed artifact), HTML rows string-concatenated for
line length, walrus tuple in BIP-340 verify split into named generator,
unused pytest import dropped. No behavior changes; 44/44 tests pass.
Full-gate discipline restored: ruff exit 0.

cayceops/components/publisher/nostr.py

@@ -119,7 +119,14 @@ def _schnorr_verify(sig32: bytes, msg32: bytes, xonly_pub32: bytes) -> bool:
     if pub_point is None:
         return False
     e = int.from_bytes(tag_hash("BIP0340/challenge", sig32[:32] + xonly_pub32 + msg32), "big") % N
-    r_point = point_add(point_mul((Gx := 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798, Gy := 0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8), s), point_mul(pub_point, (N - e) % N))
+    generator = (
+        0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798,  # Gx
+        0x483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8,  # Gy
+    )
+    r_point = point_add(
+        point_mul(generator, s),
+        point_mul(pub_point, (N - e) % N),
+    )
     if r_point is None or r_point[1] % 2 != 0:
         return False
     return r_point[0] == r
@@ -134,7 +141,8 @@ def verify_event(event: dict[str, Any]) -> bool:
     )
     if hashlib.sha256(serialized.encode("utf-8")).hexdigest() != event["id"]:
         return False
-    compressed = PublicKey(bytes.fromhex("02" + event["pubkey"])).format()  # 33-byte, prefix 02
+    # 33-byte compressed point (02-prefixed x-only)
+    compressed = PublicKey(bytes.fromhex("02" + event["pubkey"])).format()
     return _schnorr_verify(
         bytes.fromhex(event["sig"]), bytes.fromhex(event["id"]), compressed[1:]
     )
@@ -152,7 +160,9 @@ def relay_publish(relay_url: str, event: dict[str, Any], timeout: float = 10.0)
     return str(reply[1])
 
 
-def publish(relays: list[str], event: dict[str, Any], timeout: float = 10.0) -> list[dict[str, str]]:
+def publish(
+    relays: list[str], event: dict[str, Any], timeout: float = 10.0
+) -> list[dict[str, str]]:
     """Publish to every relay; report per-relay outcome (never raises unless all fail)."""
     results = []
     for relay in relays: