Add Ferret support to Paste

Summary:
Ref PHI1292. Enable fulltext searchs in paste. Maybe this should only index a snippet instead of the entire content?

Also updates table names in `PhabricatorPasteQuery`.

Test Plan: Created some pastes, indexed them, searched for them.

Reviewers: amckinley

Subscribers: codeblock, Korvin, PHID-OPKG-gm6ozazyms6q6i22gyam

Differential Revision: https://secure.phabricator.com/D20650

resources/sql/autopatches/20200416.paste.01.ferret.doc.sql

@@ -0,0 +1,9 @@
+CREATE TABLE {$NAMESPACE}_paste.paste_paste_fdocument (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  objectPHID VARBINARY(64) NOT NULL,
+  isClosed BOOL NOT NULL,
+  authorPHID VARBINARY(64),
+  ownerPHID VARBINARY(64),
+  epochCreated INT UNSIGNED NOT NULL,
+  epochModified INT UNSIGNED NOT NULL
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

resources/sql/autopatches/20200416.paste.02.ferret.field.sql

@@ -0,0 +1,8 @@
+CREATE TABLE {$NAMESPACE}_paste.paste_paste_ffield (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  documentID INT UNSIGNED NOT NULL,
+  fieldKey VARCHAR(4) NOT NULL COLLATE {$COLLATE_TEXT},
+  rawCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT},
+  termCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT},
+  normalCorpus LONGTEXT NOT NULL COLLATE {$COLLATE_SORT}
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

resources/sql/autopatches/20200416.paste.03.ferret.ngrams.sql

@@ -0,0 +1,5 @@
+CREATE TABLE {$NAMESPACE}_paste.paste_paste_fngrams (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  documentID INT UNSIGNED NOT NULL,
+  ngram CHAR(3) NOT NULL COLLATE {$COLLATE_TEXT}
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};

resources/sql/autopatches/20200416.paste.04.ferret.cngrams.sql

@@ -0,0 +1,7 @@
+CREATE TABLE {$NAMESPACE}_paste.paste_paste_fngrams_common (
+  id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY,
+  ngram CHAR(3) NOT NULL COLLATE {$COLLATE_TEXT},
+  needsCollection BOOL NOT NULL,
+  UNIQUE KEY `key_ngram` (ngram),
+  KEY `key_collect` (needsCollection)
+) ENGINE=InnoDB, COLLATE {$COLLATE_TEXT};