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>

e2e/internal/factory/factory.go

@@ -755,77 +755,6 @@ func (b *DatumBuilder) Create() string {
 	return CreateDatum(b.client, b.ownerID, b.attrs)
 }
 
-func CreateMeeting(c *testutil.Client, attrs ...Attrs) string {
-	c.T.Helper()
-
-	var a Attrs
-	if len(attrs) > 0 {
-		a = attrs[0]
-	}
-
-	const query = `
-		mutation($input: CreateMeetingInput!) {
-			createMeeting(input: $input) {
-				meetingEdge {
-					node { id }
-				}
-			}
-		}
-	`
-
-	input := map[string]any{
-		"organizationId": c.GetOrganizationID().String(),
-		"name":           a.getString("name", SafeName("Meeting")),
-		"date":           a.getString("date", "2025-01-15T10:00:00Z"),
-	}
-	if minutes := a.getStringPtr("minutes"); minutes != nil {
-		input["minutes"] = *minutes
-	}
-
-	var result struct {
-		CreateMeeting struct {
-			MeetingEdge struct {
-				Node struct {
-					ID string `json:"id"`
-				} `json:"node"`
-			} `json:"meetingEdge"`
-		} `json:"createMeeting"`
-	}
-
-	err := c.Execute(query, map[string]any{"input": input}, &result)
-	require.NoError(c.T, err, "createMeeting mutation failed")
-
-	return result.CreateMeeting.MeetingEdge.Node.ID
-}
-
-type MeetingBuilder struct {
-	client *testutil.Client
-	attrs  Attrs
-}
-
-func NewMeeting(c *testutil.Client) *MeetingBuilder {
-	return &MeetingBuilder{client: c, attrs: Attrs{}}
-}
-
-func (b *MeetingBuilder) WithName(name string) *MeetingBuilder {
-	b.attrs["name"] = name
-	return b
-}
-
-func (b *MeetingBuilder) WithDate(date string) *MeetingBuilder {
-	b.attrs["date"] = date
-	return b
-}
-
-func (b *MeetingBuilder) WithMinutes(minutes string) *MeetingBuilder {
-	b.attrs["minutes"] = minutes
-	return b
-}
-
-func (b *MeetingBuilder) Create() string {
-	return CreateMeeting(b.client, b.attrs)
-}
-
 type DocumentBuilder struct {
 	client    *testutil.Client
 	attrs     Attrs