fix(models): add explicit enum names to match migration types

SQLAlchemy's Enum() auto-generates type names from Python class names
(e.g., AutonomyLevel -> autonomylevel), but migrations defined them
with underscores (e.g., autonomy_level). This mismatch caused:

  "type 'autonomylevel' does not exist"

Added explicit name parameters to all enum columns to match the
migration-defined type names:
- autonomy_level, project_status, project_complexity, client_mode
- agent_status, sprint_status
- issue_type, issue_status, issue_priority, sync_status

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

backend/app/models/syndarix/agent_instance.py

@@ -62,7 +62,7 @@ class AgentInstance(Base, UUIDMixin, TimestampMixin):
 
     # Status tracking
     status: Column[AgentStatus] = Column(
-        Enum(AgentStatus),
+        Enum(AgentStatus, name="agent_status"),
         default=AgentStatus.IDLE,
         nullable=False,
         index=True,

backend/app/models/syndarix/issue.py

@@ -59,7 +59,7 @@ class Issue(Base, UUIDMixin, TimestampMixin):
 
     # Issue type (Epic, Story, Task, Bug)
     type: Column[IssueType] = Column(
-        Enum(IssueType),
+        Enum(IssueType, name="issue_type"),
         default=IssueType.TASK,
         nullable=False,
         index=True,
@@ -78,14 +78,14 @@ class Issue(Base, UUIDMixin, TimestampMixin):
 
     # Status and priority
     status: Column[IssueStatus] = Column(
-        Enum(IssueStatus),
+        Enum(IssueStatus, name="issue_status"),
         default=IssueStatus.OPEN,
         nullable=False,
         index=True,
     )
 
     priority: Column[IssuePriority] = Column(
-        Enum(IssuePriority),
+        Enum(IssuePriority, name="issue_priority"),
         default=IssuePriority.MEDIUM,
         nullable=False,
         index=True,
@@ -132,7 +132,7 @@ class Issue(Base, UUIDMixin, TimestampMixin):
 
     # Sync status with external tracker
     sync_status: Column[SyncStatus] = Column(
-        Enum(SyncStatus),
+        Enum(SyncStatus, name="sync_status"),
         default=SyncStatus.SYNCED,
         nullable=False,
         # Note: Index defined in __table_args__ as ix_issues_sync_status

backend/app/models/syndarix/project.py

@@ -35,28 +35,28 @@ class Project(Base, UUIDMixin, TimestampMixin):
     description = Column(Text, nullable=True)
 
     autonomy_level: Column[AutonomyLevel] = Column(
-        Enum(AutonomyLevel),
+        Enum(AutonomyLevel, name="autonomy_level"),
         default=AutonomyLevel.MILESTONE,
         nullable=False,
         index=True,
     )
 
     status: Column[ProjectStatus] = Column(
-        Enum(ProjectStatus),
+        Enum(ProjectStatus, name="project_status"),
         default=ProjectStatus.ACTIVE,
         nullable=False,
         index=True,
     )
 
     complexity: Column[ProjectComplexity] = Column(
-        Enum(ProjectComplexity),
+        Enum(ProjectComplexity, name="project_complexity"),
         default=ProjectComplexity.MEDIUM,
         nullable=False,
         index=True,
     )
 
     client_mode: Column[ClientMode] = Column(
-        Enum(ClientMode),
+        Enum(ClientMode, name="client_mode"),
         default=ClientMode.AUTO,
         nullable=False,
         index=True,

backend/app/models/syndarix/sprint.py

@@ -57,7 +57,7 @@ class Sprint(Base, UUIDMixin, TimestampMixin):
 
     # Status
     status: Column[SprintStatus] = Column(
-        Enum(SprintStatus),
+        Enum(SprintStatus, name="sprint_status"),
         default=SprintStatus.PLANNED,
         nullable=False,
         index=True,