Summary

• mastodon_api_status: fix @param/@return from array|null to Entity\Status|null (14 occurrences across 3 files)
• mastodon_api_instance_v1: fix from array to Entity\Instance
• mastodon_api_account_following: fix from array to Entity\Account[]
• mastodon_api_account_followers: fix from array to Entity\Account[]
• mastodon_api_account_relationships: fix from array to Entity\Relationship[]
• mastodon_api_conversations: fix from array|null to Entity\Conversation[], add @return
• mastodon_api_account_follow: add missing @return
• mastodon_api_submit_status: add missing docblock
• mastodon_api_edit_status: add missing docblock
• mastodon_api_status_source: add missing docblock
• mastodon_api_status_context: add missing docblock
• mastodon_api_conversation: add missing docblock (2 occurrences)
• Fix wrong docblocks on conversation_mark_read/conversation_delete do_action calls
• Fix missing closing ``` and syntax errors in existing examples

Test plan

• Verify the docblock types match what the filter callbacks actually receive and return