Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/builders/email/from_builder.rb

@@ -0,0 +1,51 @@
+class Email::FromBuilder < Email::BaseBuilder
+  pattr_initialize [:inbox!, :message!]
+
+  def build
+    return sender_name(account_support_email) unless inbox.email?
+
+    from_email = case email_channel_type
+                 when :standard_imap_smtp,
+                      :google_oauth,
+                      :microsoft_oauth,
+                      :forwarding_own_smtp
+                   channel.email
+                 when :imap_chatwoot_smtp,
+                      :forwarding_chatwoot_smtp
+                   channel.verified_for_sending ? channel.email : account_support_email
+                 else
+                   account_support_email
+                 end
+
+    sender_name(from_email)
+  end
+
+  private
+
+  def email_channel_type
+    return :google_oauth if channel.google?
+    return :microsoft_oauth if channel.microsoft?
+    return :standard_imap_smtp if imap_and_smtp_enabled?
+    return :imap_chatwoot_smtp if imap_enabled_without_smtp?
+    return :forwarding_own_smtp if forwarding_with_own_smtp?
+    return :forwarding_chatwoot_smtp if forwarding_without_smtp?
+
+    :unknown
+  end
+
+  def imap_and_smtp_enabled?
+    channel.imap_enabled && channel.smtp_enabled
+  end
+
+  def imap_enabled_without_smtp?
+    channel.imap_enabled && !channel.smtp_enabled
+  end
+
+  def forwarding_with_own_smtp?
+    !channel.imap_enabled && channel.smtp_enabled
+  end
+
+  def forwarding_without_smtp?
+    !channel.imap_enabled && !channel.smtp_enabled
+  end
+end