feat(migrations): Harden task audit tracking and optimize article templates

- Added migration to harden task audit tracking by modifying audit_logs and related tables.
- Introduced operator_id to several tables for better tracking of actions.
- Updated article_templates with new prompt templates for various article types, enhancing content generation.
- Created prompt_rules and schedule_tasks tables to manage content generation rules and scheduling.
- Added foreign key constraints to articles for better data integrity.

server/internal/tenant/repository/generated/workspace.sql.go

@@ -94,7 +94,7 @@ func (q *Queries) GetQuotaSummary(ctx context.Context, tenantID int64) (int32, e
 
 const getRecentArticles = `-- name: GetRecentArticles :many
 SELECT a.id, a.generate_status, a.publish_status, a.source_type, a.created_at,
-       av.title, av.word_count, av.source_label,
+       av.title, av.markdown_content, av.word_count, av.source_label,
        t.template_name
 FROM articles a
 LEFT JOIN article_versions av ON av.id = a.current_version_id
@@ -105,15 +105,16 @@ LIMIT 10
 `
 
 type GetRecentArticlesRow struct {
-	ID             int64              `json:"id"`
-	GenerateStatus string             `json:"generate_status"`
-	PublishStatus  string             `json:"publish_status"`
-	SourceType     string             `json:"source_type"`
-	CreatedAt      pgtype.Timestamptz `json:"created_at"`
-	Title          pgtype.Text        `json:"title"`
-	WordCount      pgtype.Int4        `json:"word_count"`
-	SourceLabel    pgtype.Text        `json:"source_label"`
-	TemplateName   pgtype.Text        `json:"template_name"`
+	ID              int64              `json:"id"`
+	GenerateStatus  string             `json:"generate_status"`
+	PublishStatus   string             `json:"publish_status"`
+	SourceType      string             `json:"source_type"`
+	CreatedAt       pgtype.Timestamptz `json:"created_at"`
+	Title           pgtype.Text        `json:"title"`
+	MarkdownContent pgtype.Text        `json:"markdown_content"`
+	WordCount       pgtype.Int4        `json:"word_count"`
+	SourceLabel     pgtype.Text        `json:"source_label"`
+	TemplateName    pgtype.Text        `json:"template_name"`
 }
 
 func (q *Queries) GetRecentArticles(ctx context.Context, tenantID int64) ([]GetRecentArticlesRow, error) {
@@ -132,6 +133,7 @@ func (q *Queries) GetRecentArticles(ctx context.Context, tenantID int64) ([]GetR
 			&i.SourceType,
 			&i.CreatedAt,
 			&i.Title,
+			&i.MarkdownContent,
 			&i.WordCount,
 			&i.SourceLabel,
 			&i.TemplateName,