feat: add BDD feature files for pytest-bdd scenarios

Created 5 feature files covering blog generation, scheduling, LLM provider
selection, SEO population, and notification emails. These files define the
Gherkin scenarios that pytest-bdd will generate test functions for.

- blog_generation.feature: On-demand generation with auto-publish toggle
- blog_scheduling.feature: Scheduled cron slot execution
- llm_provider_selection.feature: Provider dispatch and error handling
- seo_population.feature: SEO metadata and tag assignment
- notification_email.feature: Email notifications after generation

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

addons/itsulu_blog_publisher/tests/features/blog_generation.feature

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+Feature: On-demand blog generation
+  As a content editor
+  I want to generate blog posts on demand using the wizard
+  So that I can quickly create content
+
+  Scenario: Generate and auto-publish a blog post from the backend
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    And I am on the Blog Publisher backend form
+    And I enter topic "AI Governance Frameworks"
+    And I select provider "anthropic" and model "claude-sonnet-4-20250514"
+    And I set auto-publish to true
+    When I click "Generate Now"
+    Then a blog.post record is created with a non-empty title
+    And the blog.post body_arch contains at least 200 characters of HTML
+    And the blog.post is_published is true
+    And the SEO fields website_meta_title and website_meta_description are populated
+    And a generation log entry exists with state "success"
+
+  Scenario: Generate a blog post and leave it as draft
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    And I am on the Blog Publisher backend form
+    And I enter topic "Cloud Cost Optimization"
+    And I select provider "anthropic" and model "claude-sonnet-4-20250514"
+    And I set auto-publish to false
+    When I click "Generate Now"
+    Then a blog.post record is created with a non-empty title
+    And the blog.post is_published is false
+    And a generation log entry exists with state "success"
+
+  Scenario: LLM API call fails gracefully
+    Given the Anthropic API key is invalid
+    And the blog "ITSulu Insights" exists in Odoo
+    And I am on the Blog Publisher backend form
+    And I enter topic "Any Topic"
+    When I click "Generate Now"
+    Then no blog.post record is created
+    And a generation log entry exists with state "error"
+    And the log contains a human-readable error message
+    And a "Retry" button is visible on the log record

addons/itsulu_blog_publisher/tests/features/blog_scheduling.feature

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+Feature: Schedule slot execution
+  As a system administrator
+  I want scheduled cron slots to run and generate blog posts
+  So that content is published automatically at configured times
+
+  Scenario: Active morning slot creates a blog post when run
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    When the generation completes
+    Then a blog.post record is created with a non-empty title
+    And a generation log entry exists with state "success"
+
+  Scenario Outline: Schedule slot generates from different topic sources
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    When the generation completes
+    Then a blog.post record is created with a non-empty title
+    And the generation log trigger_source is "scheduled"

addons/itsulu_blog_publisher/tests/features/llm_provider_selection.feature

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+Feature: LLM provider selection
+  As a content system
+  I want to route LLM calls to different providers
+  So that I can use multiple AI services
+
+  Scenario Outline: Different providers can generate blog content
+    Given provider is "<provider>" and model is "<model>"
+    And the Anthropic API key is configured in Settings
+    When the LLM router is called with a prompt
+    Then returns a non-empty string response
+    And the generation log records the correct LLM provider
+    And the generation log records the correct LLM model
+
+    Examples:
+      | provider  | model                      |
+      | anthropic | claude-sonnet-4-20250514   |
+      | openai    | gpt-4o                     |
+      | gemini    | gemini-2.0-flash           |
+
+  Scenario: Ollama provider generates blog content using local model
+    Given the Ollama base URL is "http://localhost:11434"
+    And provider is "ollama" and model is "mistral"
+    When the LLM router is called with a prompt
+    Then returns a non-empty string response
+    And the router calls http://localhost:11434/api/chat
+
+  Scenario: Unknown provider raises configuration error
+    Given provider is "unknown_provider" and model is "some-model"
+    When the LLM router is called with a prompt
+    Then a UserError is raised with message containing "not configured"

addons/itsulu_blog_publisher/tests/features/notification_email.feature

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+Feature: Notification email after generation
+  As a content manager
+  I want to be notified when blog posts are generated and published
+  So that I can review and monitor content creation
+
+  Scenario: Notification email is sent after successful autopublish
+    Given the notification email recipient is "admin@itsulu.com"
+    And a blog post was generated and auto-published
+    When the generation completes
+    Then exactly one email is sent to "admin@itsulu.com"
+    And the email subject matches "Blog post"
+    And the email body contains the blog post title
+    And the email body contains social media copy for all enabled platforms
+
+  Scenario: Notification email is not sent for draft posts
+    Given the notification email recipient is "admin@itsulu.com"
+    And a blog post was generated and auto-published
+    When the generation completes
+    Then exactly one email is sent to "admin@itsulu.com"
+    And the email body contains the blog post title
+    And the generation duration is recorded
+    And the generation log record contains tokens_used > 500

addons/itsulu_blog_publisher/tests/features/seo_population.feature

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+Feature: SEO field population
+  As a content system
+  I want generated blog posts to have SEO metadata
+  So that posts rank well in search engines
+
+  Scenario: All SEO fields are populated after generation
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    And I am on the Blog Publisher backend form
+    And I enter topic "Kubernetes Cost Optimization"
+    And I select provider "anthropic" and model "claude-sonnet-4-20250514"
+    When I click "Generate Now"
+    Then the SEO fields website_meta_title and website_meta_description are populated
+    And the blog.post has tags assigned
+    And the blog.post tags include "Kubernetes"
+
+  Scenario: Generated blog post has social media copy
+    Given the Anthropic API key is configured in Settings
+    And the blog "ITSulu Insights" exists in Odoo
+    And I am on the Blog Publisher backend form
+    And I enter topic "Enterprise AI Security"
+    When I click "Generate Now"
+    Then the blog.post has social media copy assigned
+    And at least one social platform is enabled