feat: Use resolved contacts as base relation for filtering (#12520)

This PR has two changes to speed up contact filtering

### Updated Base Relation

Update the `base_relation` to use resolved contacts scope to improve
perf when filtering conversations. This narrows the search space
drastically, and what is usually a sequential scan becomes a index scan
for that `account_id`

ref: https://github.com/chatwoot/chatwoot/pull/9347
ref: https://github.com/chatwoot/chatwoot/pull/7175/

Result: https://explain.dalibo.com/plan/c8a8gb17f0275fgf#plan


## Selective filtering in Compose New Conversation

We also cost of filtering in compose new conversation dialog by reducing
the search space based on the search candidate. For instance, a search
term that obviously can’t be a phone, we exclude that from the filter.
Similarly we skip name lookups for email-shaped queries.

Removing the phone number took the query times from 50 seconds to under
1 seconds

### Comparison

1. Only Email: https://explain.dalibo.com/plan/h91a6844a4438a6a 
2. Email + Name: https://explain.dalibo.com/plan/beg3aah05ch9ade0
3. Email + Name + Phone:
https://explain.dalibo.com/plan/c8a8gb17f0275fgf

spec/jobs/account/contacts_export_job_spec.rb

@@ -103,13 +103,11 @@ RSpec.describe Account::ContactsExportJob do
       expect(csv_data.length).to eq(1)
     end
 
-    # TODO: This returns unresolved contacts as well since filter service returns the same
-    # Change this when we make changes to filter service and ensure only resolved contacts are returned
-    it 'returns filtered data which inclues unresolved contacts when filter is provided' do
+    it 'returns filtered data limited to resolved contacts when filter is provided' do
       create(:contact, account: account, email: nil, phone_number: nil, additional_attributes: { :country_code => 'India' })
       described_class.perform_now(account.id, user.id, [], { :payload => [city_filter.merge(:query_operator => nil)] }.with_indifferent_access)
       csv_data = CSV.parse(account.contacts_export.download, headers: true)
-      expect(csv_data.length).to eq(5)
+      expect(csv_data.length).to eq(4)
     end
 
     it 'returns filtered data when multiple filters are provided' do

spec/services/contacts/filter_service_spec.rb

@@ -7,9 +7,25 @@ describe Contacts::FilterService do
   let!(:first_user) { create(:user, account: account) }
   let!(:second_user) { create(:user, account: account) }
   let!(:inbox) { create(:inbox, account: account, enable_auto_assignment: false) }
-  let!(:en_contact) { create(:contact, account: account, additional_attributes: { 'country_code': 'uk' }) }
-  let!(:el_contact) { create(:contact, account: account, additional_attributes: { 'country_code': 'gr' }) }
-  let!(:cs_contact) { create(:contact, :with_phone_number, account: account, additional_attributes: { 'country_code': 'cz' }) }
+  let!(:en_contact) do
+    create(:contact,
+           account: account,
+           email: Faker::Internet.unique.email,
+           additional_attributes: { 'country_code': 'uk' })
+  end
+  let!(:el_contact) do
+    create(:contact,
+           account: account,
+           email: Faker::Internet.unique.email,
+           additional_attributes: { 'country_code': 'gr' })
+  end
+  let!(:cs_contact) do
+    create(:contact,
+           :with_phone_number,
+           account: account,
+           email: Faker::Internet.unique.email,
+           additional_attributes: { 'country_code': 'cz' })
+  end
 
   before do
     create(:inbox_member, user: first_user, inbox: inbox)
@@ -103,7 +119,12 @@ describe Contacts::FilterService do
 
     context 'with standard attributes - blocked' do
       it 'filter contacts by blocked' do
-        blocked_contact = create(:contact, account: account, blocked: true)
+        blocked_contact = create(
+          :contact,
+          account: account,
+          blocked: true,
+          email: Faker::Internet.unique.email
+        )
         params = { payload: [{ attribute_key: 'blocked', filter_operator: 'equal_to', values: ['true'],
                                query_operator: nil }.with_indifferent_access] }
         result = filter_service.new(account, first_user, params).perform