fix: stop S7632 flagging NOSONAR mentioned in prose comments

SonarCloud's python:S7632 parses the literal ``# NOSONAR`` token wherever it
appears — including inside explanatory comments that *quote* the directive —
and treats the following text as a malformed suppression. The actual bare
``# NOSONAR`` suppression lines are fine; the flagged lines were the prose
comments describing them. Reword those comments to drop the inner ``#`` so the
analyzer no longer sees a directive.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

nextcloud_mcp_server/embedding/gateway_client.py

@@ -122,8 +122,8 @@ class GatewayProvider(OpenAIProvider):
         # AsyncOpenAI rejects an empty key; use a non-secret placeholder when
         # the gateway is unauthenticated. When a token provider is configured,
         # the real Bearer is set on the client before each request. The bare
-        # ``# NOSONAR`` silences the hard-coded-credential hotspot — this is a
+        # suppression marker below silences the hard-coded-credential hotspot —
-        # public placeholder string, not a secret.
+        # this is a public placeholder string, not a secret.
         super().__init__(
             api_key=_UNAUTHENTICATED_PLACEHOLDER,  # NOSONAR
             base_url=base_url,

nextcloud_mcp_server/vector/queue/nats.py

@@ -156,9 +156,9 @@ class NatsTaskProducer:
     ) -> None:
         return None
 
-    # The bare ``# NOSONAR`` silences ``python:S7503`` (async method without
+    # The bare suppression marker silences S7503 (async method without await):
-    # await): ``async def`` is required by the TaskProducer protocol, but this
+    # ``async def`` is required by the TaskProducer protocol, but this handle
-    # handle close is a genuine no-op.
+    # close is a genuine no-op.
     async def aclose(self) -> None:  # NOSONAR
         # Per-handle close (e.g. a per-user scanner clone exiting). The bus
         # connection is shared and owned by the lifespan, so this is a no-op;

nextcloud_mcp_server/vector/queue/postgres.py

@@ -45,7 +45,7 @@ class PostgresTaskProducer:
     ) -> None:  # pragma: no cover
         return None
 
-    # Bare ``# NOSONAR`` silences ``python:S7503`` (async method without await):
+    # The bare suppression marker silences S7503 (async method without await):
     # ``async def`` is required by the TaskProducer protocol; this stub is a
     # no-op until the Postgres transport lands.
     async def aclose(self) -> None:  # NOSONAR  # pragma: no cover