Remove meeting feature

Drop meetings and meeting_attendees tables, remove all meeting-related
code across GraphQL, MCP, CLI, N8N, webhooks, frontend, and e2e tests.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

pkg/webhook/types/meeting.go

@@ -1,42 +0,0 @@
-// Copyright (c) 2026 Probo Inc <hello@getprobo.com>.
-//
-// Permission to use, copy, modify, and/or distribute this software for any
-// purpose with or without fee is hereby granted, provided that the above
-// copyright notice and this permission notice appear in all copies.
-//
-// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
-// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
-// AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
-// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
-// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
-// OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
-// PERFORMANCE OF THIS SOFTWARE.
-
-package types
-
-import (
-	"time"
-
-	"go.probo.inc/probo/pkg/coredata"
-	"go.probo.inc/probo/pkg/gid"
-)
-
-type Meeting struct {
-	ID        gid.GID   `json:"id"`
-	Name      string    `json:"name"`
-	Date      time.Time `json:"date"`
-	Minutes   *string   `json:"minutes"`
-	CreatedAt time.Time `json:"createdAt"`
-	UpdatedAt time.Time `json:"updatedAt"`
-}
-
-func NewMeeting(m *coredata.Meeting) *Meeting {
-	return &Meeting{
-		ID:        m.ID,
-		Name:      m.Name,
-		Date:      m.Date,
-		Minutes:   m.Minutes,
-		CreatedAt: m.CreatedAt,
-		UpdatedAt: m.UpdatedAt,
-	}
-}