New Features
* #3535281 Add OpenTelemetry export to the AI Observability
* #3566585 Research and try to add Field Widget Actions (FWA) support for moderation_state using the moderation_state_default widget (content_moderation)
* #3566573 Add Field Widget Actions (FWA) support for Address field using the address_default widget.
* #3571982 Pass DeepChat context to the service that runs assistant as agent
* #3568028 Add provider info cell, capabilities display, and YAML-based provider registry
* #3510599 Allow skipping of moderations for some embeddings (controlled input)
* #3570097 Create a build script for MDXEditor with mentions
* #3551238 Make chatbot block text transatable
* #3556028 Add message role to ai_chatbot_message theme
* #3546006 Ensure exported multi-line config is human-friendly
* #3570097 Create a build script for MDXEditor with mentions
* #3559650 Allow custom messaging in AI Chatbot instead of "..."
* #3546465 Add chosen_select widget support to ClassificationOptionsSelect FieldWidgetAction
* #3488114 Add support for rerank operation type
* #3569232 Create a Rerank API Explorer for Rerank Op
* #3566582 Add Field Widget Actions (FWA) support for llm_media_audio_generation on the media_library_widget
* #3566579 Add Field Widget Actions (FWA) support for core Image field using llm_image_generation
* #3566577 Add Field Widget Actions (FWA) support for FAQ Field using the faqfield_default widget.
* #3566576 Add Field Widget Actions (FWA) support for Chart field using the chart_config_default widget
* #3547500 Change Content-Type to application/json for the application firewall be happy.
* #3566583 Add Field Widget Actions (FWA) support for text-to-image media generation on the media_library_widget for core Image media
* #3556181 Create a form element for selecting providers
* #3569856 "Cart: Order item comparison fields" event cannot be used to alter comparison fields
* #3547635 Translating large jobs via the ai provider often fails: allow configurable HTTP client timeout
* #3567796 UX: AI Prompts: Improve UX around initial setup

Tasks
* #3568342 Backport changes from #3563524, #3560562 and  #3563497 to sync with standalone contrib
* #3561791 Create official AI User Experience (UX) documentation
* #3554510 Sync Design of Toolbar Chatbot with Canvas AI Chatbot
* #3568213 Add parameterless function to AI Test
* #3569726 Turn off phpunit previous major, because of upstream issue
* #3566566 Release 1.2.6 and 1.1.9, and update documentation
* #3568567 Document patch base tests.
* #3569557 Add review instructions to documentation
* #3572580 Turn off next major
* #3572580 Turn off next major
* #3568502 Up the requirement of 1.3.x to Drupal 10.5 and Drupal 11.2
* #3572580 Turn off next major

Bugs
* #3561236 All log entries for a single agent call have same "created" timestamp?
* #3573429 Processing automators does not catch all errors
* #3568008 Backport data-settings removal from #3567110
* #3568574 The Toolbar Chatbot makes it impossible to close
* #3564524 Drupal 11.3 deprecation warnings
* #3561034 CKEditor AI Tools configuration form removes first model of first provider.
* #3552782 AiProviderInterface::getConfiguredModels code documentation
* #3568581 Toolbar Chatbot Unusable in Olivero
* #3572096 Fix DeepChatFormBlock defaultConfiguration() sets invalid style_file key, preventing toolbar.yml from being used as default
* #3569116  File/Audio Automator results not visible immediately after generation
* #3572838 Chat History doesn't show tools on assistant
* #3574457 Remove ECA dev dependency from  AI module
* #3574286 Loading of configuration is broken in API Explorer in 1.3

Planning
* #3561969 Research Structured Content/JSON:schema form element

Contributors:
tonytosta, murz, a.dmitriiev, mxr576, stefanweber, arianraeesi, marcus_johansson, prabha1997, shalini_jha, scott_euser, ultimike, ahmad khader, anjaliprasannan, harivansh, fago, petar_basic, scott falconer, erichomanchuk, afoster, kristen pol, breidert, yannickoo, emma horrell, csakiistvan, bbruno, unqunq, dan2k3k4, robloach, wouters_f, mrdalesmith, prashant.c, yonailo, ben.bastow, abhisekmazumdar, chrislarrycarl, nikro, stefan.korn, igor mashevskyi, valthebald, divyansh.gupta, thamas, annmarysruthy, b_sharpe, brunaemerich, brunocarvalho, codebymikey, danrod, ronraney, ezeedub, saranya ashokkumar, lussoluca, yautja_cetanu, gxleano, gurnoor kaur, rondev, jibran, ferran_bosch, angela saldaña, starlight-sparkle, nicxvan, doxigo, svendecabooter