chore: add TSVECTOR column

Author: venki91

lib/index.js

@@ -120,6 +120,7 @@ class ErrsolePostgres extends EventEmitter {
         timestamp TIMESTAMPTZ DEFAULT CURRENT_TIMESTAMP,
         level VARCHAR(31) DEFAULT 'info',
         message TEXT,
+        message_tsv TSVECTOR GENERATED ALWAYS AS (to_tsvector('english', message)) STORED,
         meta TEXT,
         errsole_id BIGINT
       )`,
@@ -129,6 +130,7 @@ class ErrsolePostgres extends EventEmitter {
       `CREATE INDEX IF NOT EXISTS idx_${this.logsTable}_source_level_timestamp_id ON ${this.logsTable} (source, level, timestamp, id)`,
       `CREATE INDEX IF NOT EXISTS idx_${this.logsTable}_timestamp_id ON ${this.logsTable} (timestamp, id)`,
       `CREATE INDEX IF NOT EXISTS idx_${this.logsTable}_errsole_id ON ${this.logsTable} (errsole_id)`,
+      `CREATE INDEX IF NOT EXISTS idx_${this.logsTable}_message_tsv ON ${this.logsTable} USING GIN (message_tsv)`,
 
       `CREATE TABLE IF NOT EXISTS ${this.usersTable} (
         id BIGSERIAL PRIMARY KEY,
@@ -410,10 +412,9 @@ class ErrsolePostgres extends EventEmitter {
 
     // Search terms with AND logic
     if (searchTerms && searchTerms.length > 0) {
-      searchTerms.forEach(term => {
-        whereClauses.push(`message ILIKE $${index++}`);
-        values.push(`%${term}%`);
-      });
+      const tsQuery = searchTerms.map(term => `${term}:*`).join(' & '); // AND logic for search terms
+      whereClauses.push(`message_tsv @@ to_tsquery('english', $${index++})`);
+      values.push(tsQuery);
     }
 
     // Apply filters