Add priority flag to jobs

- Migration 0010: priority BOOLEAN NOT NULL DEFAULT 0 on print_jobs
- Priority jobs sort above normal jobs in the list
- Checkbox in Add Job modal; warning icon in list; badge on detail page

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/models/print_job.py

@@ -3,7 +3,7 @@ import uuid as _uuid
 from datetime import datetime
 from decimal import Decimal
 
-from sqlalchemy import DateTime, Enum, ForeignKey, Integer, Numeric, String, Text, func
+from sqlalchemy import Boolean, DateTime, Enum, ForeignKey, Integer, Numeric, String, Text, func
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
 from app.models.base import Base
@@ -29,6 +29,7 @@ class PrintJob(Base):
     file_name: Mapped[str | None] = mapped_column(String(255))
     job_material: Mapped[str | None] = mapped_column(String(50))
     job_color: Mapped[str | None] = mapped_column(String(100))
+    priority: Mapped[bool] = mapped_column(Boolean, default=False)
     status: Mapped[JobStatus] = mapped_column(Enum(JobStatus), default=JobStatus.queued)
     queue_position: Mapped[int | None] = mapped_column(Integer)
     started_at: Mapped[datetime | None] = mapped_column(DateTime)