fix: add values_callable to all SQLAlchemy Enum columns

SQLAlchemy 2.0 defaults to mapping Python enum *names* (OPEN, CLOSED)
to DB values, but MySQL stores lowercase *values* (open, closed).
This mismatch causes LookupError on read.

Adding values_callable=lambda x: [e.value for e in x] tells SQLAlchemy
to use the enum values for DB mapping.

Affected models: milestone, task, meeting, propose, support

app/models/meeting.py

@@ -22,8 +22,8 @@ class Meeting(Base):
     id = Column(Integer, primary_key=True, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    status = Column(Enum(MeetingStatus), default=MeetingStatus.SCHEDULED)
+    status = Column(Enum(MeetingStatus, values_callable=lambda x: [e.value for e in x]), default=MeetingStatus.SCHEDULED)
-    priority = Column(Enum(MeetingPriority), default=MeetingPriority.MEDIUM)
+    priority = Column(Enum(MeetingPriority, values_callable=lambda x: [e.value for e in x]), default=MeetingPriority.MEDIUM)
     meeting_code = Column(String(64), nullable=True, unique=True, index=True)
     
     project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)

app/models/milestone.py

@@ -17,7 +17,7 @@ class Milestone(Base):
     id = Column(Integer, primary_key=True, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    status = Column(Enum(MilestoneStatus), default=MilestoneStatus.OPEN)
+    status = Column(Enum(MilestoneStatus, values_callable=lambda x: [e.value for e in x]), default=MilestoneStatus.OPEN)
     milestone_code = Column(String(64), nullable=True, unique=True, index=True)
     due_date = Column(DateTime(timezone=True), nullable=True)
     planned_release_date = Column(DateTime(timezone=True), nullable=True)

app/models/propose.py

@@ -17,7 +17,7 @@ class Propose(Base):
     propose_code = Column(String(64), nullable=True, unique=True, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    status = Column(Enum(ProposeStatus), default=ProposeStatus.OPEN)
+    status = Column(Enum(ProposeStatus, values_callable=lambda x: [e.value for e in x]), default=ProposeStatus.OPEN)
 
     project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)
     created_by_id = Column(Integer, ForeignKey("users.id"), nullable=True)

app/models/support.py

@@ -22,8 +22,8 @@ class Support(Base):
     id = Column(Integer, primary_key=True, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    status = Column(Enum(SupportStatus), default=SupportStatus.OPEN)
+    status = Column(Enum(SupportStatus, values_callable=lambda x: [e.value for e in x]), default=SupportStatus.OPEN)
-    priority = Column(Enum(SupportPriority), default=SupportPriority.MEDIUM)
+    priority = Column(Enum(SupportPriority, values_callable=lambda x: [e.value for e in x]), default=SupportPriority.MEDIUM)
     support_code = Column(String(64), nullable=True, unique=True, index=True)
     
     project_id = Column(Integer, ForeignKey("projects.id"), nullable=False)

app/models/task.py

@@ -23,8 +23,8 @@ class Task(Base):
     id = Column(Integer, primary_key=True, index=True)
     title = Column(String(255), nullable=False)
     description = Column(Text, nullable=True)
-    status = Column(Enum(TaskStatus), default=TaskStatus.OPEN)
+    status = Column(Enum(TaskStatus, values_callable=lambda x: [e.value for e in x]), default=TaskStatus.OPEN)
-    priority = Column(Enum(TaskPriority), default=TaskPriority.MEDIUM)
+    priority = Column(Enum(TaskPriority, values_callable=lambda x: [e.value for e in x]), default=TaskPriority.MEDIUM)
     task_code = Column(String(64), nullable=True, unique=True, index=True)
     
     # Task type/subtype (replaces old issue_type/issue_subtype)