fixed "string indices must be integers" when attempting to retrieve season images from series providers

fixed "'NoneType' object is not iterable" when retrieving languages from series provider
added retry count of 3 for SiCKRAGE oauth2 token refreshes

Added API login method for SiCKRAGE external API using new SSO API key
Removed SiCKRAGE SSO offline token usage in favour of SiCKRAGE SSO API key
Improved OAuth2 handling for external SiCKRAGE API
Added external series provider API support
Added migration code to convert lang column on tv_shows table to ISO639-3
Added migration code to convert offline token to apikey

Added better exception handling for when external SiCKRAGE API or SiCKRAGE SSO server is unreachable

AMQP consumer now declares server queue prior to connecting using SiCKRAGE API endpoint

Refactored log error to log debug in itasa.py
Fixed ProxyError requests.adapters in send when attempting API token refresh

Refactored SR API to be enabled for core functions and allow users to opt out of other non-essential functions

Added schedule for updating web server ssl certificates once a day
Added JWT token auth to web socket server
Added SiCKRAGE AMQP messaging
Refactored version updates to be handled by AMQP
Refactored network timezone updates to be handled by AMQP
Refactored search provider url updates to be handled by AMQP
Refactored how application version is stored and accessed
Refactored app update system
Added automated gitlab releasing to CI script
Refactored torrent trackers to come from SR API

Added JWT token expiration checks for SR API, will refresh token if nearing expiration automatically.

Fixed issues with updating app server id through SR API.

Added code to migrate existing config files to new config database
Refactored the term indexer to series provider
Refactored the term indexer_id to series id for tv shows and episode_id for tv episodes
Qualities are now enum classes
Episode statuses are now enum classes
Status / Quality composites are now enum classes
Refactored series provider api to support multiple series providers
Refactored core code to support multiple series providers
Refactored metadata providers config code
Data returned from SR backend to new SR web-ui is json using camelCase naming conventions
Refactored how censored items are generatored and handled for log events
Updated CI script
Fixed seeders / leechers for IPTorrents

Split API endpoints into v1 and v2
Refactored allowed web methods to include PUT, DELETE, and OPTIONS
Refactored allowed web headers to include content-type and authorization
Added new series API v2 endpoints
Refactored TVShow airs_next, airs_prev, episodes_unaired, episodes_snatched, episodes_downloaded, and episodes_special methods
Added new TVShow method epsiodes_total to speed-up main show page load times
Added marshmallow to de-serialize SQLAlchemy data for sending back to UI frontend
Added config API v2 endpoint
Converted statusStrings from UserDict to built-in dict without composite splitting
Added IMDbInfo Schema to output json to frontend
Added API v2 Authorization header handling to connect frontend to backend securely
Added API v2 patch method for updating series data
Added API v2 JSON error handler
Refactored how web async calls are done
Added allowed and preferred qualities props to show object
Added poster and banner props to show object
Added to_json method to both show and episode objects
Refactored show object get_overview function into episode object overview property
Added episode manual search API v2 endpoint
Added series episodes rename API v2 endpoint
Refactored languages API endpoint for TheTVDB API client
Refactored indexerAPI indexers function to return list of indexers
Added file browser API v2 endpoint
Updated requirements.txt to work with Python 3.9.x
SR Auth certs are now grabbed and stored to avoid rate-limit issues
Added series API v2 endpoint to add new shows
Added retrieve series metadata API v2 endpoint
Fixed parsing seeders/leechers for IPTorrents
Updated URL for gktorrents

Fixed #SICKRAGE-APP-5SY - IntegrityError sqlalchemy.engine.default in do_execute
Fixed #SICKRAGE-APP-5SH - AttributeError sickrage.notifiers.plex in update_library
Fixed #SICKRAGE-APP-5T6 - KeyError sickrage.core.tv.show in delete_show
Misc fixes for app API
Refactored Plex notifier client
Added default web session timeout of 15s
Lowered core external API timeout to 15s
Wording correcting in notifications.mako

Refactored SR API calls related to app_id to relate to new server_id
Refactored SR API to v4

Added token_type column to oauth2_token table on cache database

Refactored link/unlink sickrage account to sickrage api button to hide/show based on sickrage api enable/disable toggle

Refactored SiCKRAGE account to unlink from SiCKRAGE API only if response returned after attempting to unregister app ID is good

Added link/unlink button to `settings -> general -> advanced -> sickrage api` to link SiCKRAGE account to SiCKRAGE API

Feature added to allow opt-out of SSO auth logins
Feature added to allow opt-out of SiCKRAGE API services
Feature added to allow local auth logins
Feature added to allow whitelisting of IP addresses or subnets to bypass auth logins
Fixed issue with passing host as startup params
Fixed issue with `check_setting_bool` always returning default values

Feature added to allow opt-out of SSO auth logins
Feature added to allow opt-out of SiCKRAGE API services
Feature added to allow local auth logins
Feature added to allow whitelisting of IP addresses or subnets to bypass auth logins
Fixed issue with passing host as startup params
Fixed issue with `check_setting_bool` always returning default values

Refactored core web session exception handling
Feature added that allows searching episodes by collection format
Refactored name parser match scoring
Refactored name parser regex placement for mvgroup
Refactored show search types into SearchFormats class
Refactored main db to v12 and added in code to migrate old-style show search options to new-style show search formats
Refactored core API web session exception handling
Refactored providers by removing archetorrent and elitetorrent
Fixed season folder show option, needs to be invested as it controls flattening of folders show option
Refactored requirements.txt, updated misc packages

Refactored search clients into classes for NZB and Torrents
Refactored web session core class to add 1s sleep during connection errors for retries
Refactored using IOLoop.current() to get main ioloop, reverted back to using core variable that calls IOLoop.current() once
Refactored add show options to include sports, dvdorder, subtitle metadata, and air-by-date options

Disabled certificate verification for SR API to stop SSLError related to `certificate verify failed`

Refactored gitlab-ci script to build Synology develop package

Refactored how logs view uses max lines
Refactored queue class to fire events using threads instead of ioloop
Refactored how scheduler jobs are forced to execute on request

Fixed status code comparison logic in SR API client class for handling of http error codes between 500 and 600

Added SR API endpoints for scene exception retrieval.
Added scene_exceptions and last_scene_exceptions_refresh properties to TVShow class.
Added retrieval of scene exceptions method to TVShow class.
Added get_scene_exception_by_name to TVShow class.
Added get_scene_exception_by_season to TVShow class.
Added update_scene_exceptions to TVShow class.
Fixed charmap issue with AniDB.