Added explain analyze query plan to recommendation prompt

[dimafe6]

Description

• Explain analyze query plan has been added to prompt for more relevant recommendations. This provide more detailed information to the LLM about existing indexes utilization, actual query time etc. so LLM can provide more usefull answers.
  This feature can be enabled/disabled by recommendation_use_explain configuration.
• Two parameters ignore_explain_queries and ignore_insert_queries have been added into config to provide ability to disable logging EXPLAIN and INSERT queries.
• extractIndexesAndSchemaFromRecord function was refactored to use schema and indexes from all tables used in SQL query instead of SlowLog table schema and indexes because it doesent provide any usefull information for LLM about query. So, it means if query use multiple tables then each table with indexes and schema will be transferred to LLM for provide more usefull answers.
• Prompt text was changed to instruct LLM to use query plan and tables schema.

After this changes prompt will use more tokens but LLM will provide more usefull recommendations:

• Full queries for creating indexes;
• Completely redesigned optimized initial query;
• Recommendations for database configurations;
• Architecture recommendations (partitioning, etc.)
  
  

[halilcosdu]

Looks good thanks @dimafe6

[dimafe6]

Some additional changes:

• Send sql instead of raw_sql into LLM. To anonymize data that is transferred to a third-party service.
• Logging logic for slow queries has been changed. Listen to all queries and log slow queries by individual request time instead of the aggregate time of all queries per HTTP request. Because for now only one latest query will be log and only if total time of all queries during HTTP request will be greather than treshold. For example if controller excute 10 different requests only latest request will be logged and only if total time of this 10 request is greather than treshold. For my opinion this is not correct logic.

[halilcosdu]

Waiting readme update @dimafe6