Adds the mcp scope group with a single access permission so it shows up
in GET /api/v1/routes (and therefore in the frontend token form).
Adds APIToken.HasMCPAccess() mirroring the caldav/feeds helpers.
The MCP endpoint will use POST, GET, and DELETE on the same path for the
streamable-HTTP transport, which CanDoAPIRoute's exact (method, path)
match cannot gate. The token middleware therefore skips the route check
for /api/v1/mcp and any sub-path; the actual authorization is delegated
to an inline HasMCPAccess() call in the MCP handler (added in the next
task).
Fixtures gain two MCP tokens for user 1: one mcp-only and one with
mcp:access plus projects read scopes for the per-tool scope filter tests.
kolaente
21d7c79d5a