Proposed changes (including videos or screenshots)

Added statistics related to the new Contact Identification feature:

• totalContacts: Total number of contacts;
• totalUnknownContacts: Total number of unknown contacts;
• totalMergedContacts: Total number of merged contacts (only contacts that have been deleted on merge are considered merged -- eg if one contact has other 2 similar ones to be merged in it, we'll count 2 merged contacts, NOT 3);
• totalConflicts: Total number of merge conflicts;
• totalResolvedConflicts: Total number of resolved conflicts;
• totalBlockedContacts: Total number of blocked contacts;
• totalPartiallyBlockedContacts: Total number of contacts partially blocked -- only contacts that have at least one blocked contact (but not all of them) are counted;
• totalFullyBlockedContacts: Total number of contacts fully blocked;
• totalVerifiedContacts: Total number of verified contacts;
• avgChannelsPerContact: Average number of channels per contact;
• totalContactsWithoutChannels: Number of contacts without channels;
• totalImportedContacts: Total number of imported contacts;
• totalUpsellViews: Total number of "Advanced Contact Management" Upsell CTA views;
• totalUpsellClicks: Total number of "Advanced Contact Management" Upsell CTA clicks;

Issue(s)

Steps to test or reproduce

Further comments

For load test purposes, I populated my local DB with +2M contacts (2069065 contacts exactly) using this filler repo which I extended in a fork so that the contacts collection could also be populated randomly considering all of its optional fields and arrays of random sizes. Using this DB, I ran each new query 10 times and calculated the average execution time (in milliseconds) and a 95% confidence interval for each of them (of course, with this we're making an assumption that the average execution time for each query follow a normal distribution):

• totalConflicts and avgChannelsPerContact (they're calculated together): 3,444.1 ±75.577 (±2.19%);
• totalUnknownContacts: 324.6 ±6.268 (±1.93%);
• totalBlockedContacts: 589 ±18.433 (±3.13%);
• totalFullyBlockedContacts: 2,743.6 ±41.011 (±1.49%);
• totalPartiallyBlockedContacts: infered from totalBlockedContacts and totalFullyBlockedContacts;
• totalVerifiedContacts: 610.7 ±23.301 (±3.82%);
• totalContactsWithoutChannels: 819.9 ±23.373 (±2.85%);

All new queries used a index, except totalContactsWithoutChannels, totalConflicts and avgChannelsPerContact which all need to read all documents (so I believe they're all essentially a COLSCAN).

SCI-78