- Implementation of specialist execution api, including SSE protocol

- eveai_chat becomes deprecated and should be replaced with SSE
- Adaptation of STANDARD_RAG specialist
- Base class definition allowing to realise specialists with crewai framework
- Implementation of SPIN_SPECIALIST
- Implementation of test app for testing specialists (test_specialist_client). Also serves as an example for future SSE-based client
- Improvements to startup scripts to better handle and scale multiple connections
- Small improvements to the interaction forms and views
- Caching implementation improved and augmented with additional caches

migrations/tenant/versions/209ae2db55f0_specialist_standard_rag_renamed.py

@@ -0,0 +1,41 @@
+"""Specialist STANDARD_RAG renamed
+
+Revision ID: 209ae2db55f0
+Revises: b9cc547a0512
+Create Date: 2025-02-08 14:58:29.960295
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import pgvector
+from sqlalchemy import table, column, String
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '209ae2db55f0'
+down_revision = 'b9cc547a0512'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    # Define specialist table structure needed for the update
+    specialist = table('specialist',
+                       column('id', sa.Integer),
+                       column('type', String)
+                       )
+
+    # Update all specialists with type STANDARD_RAG to STANDARD_RAG_SPECIALIST
+    op.execute(
+        specialist.update().
+        where(specialist.c.type == 'STANDARD_RAG').
+        values(type='STANDARD_RAG_SPECIALIST')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###

migrations/tenant/versions/6857672e8164_add_type_version_default_for_specialist.py

@@ -0,0 +1,44 @@
+"""Add type_version default for specialist
+
+Revision ID: 6857672e8164
+Revises: 209ae2db55f0
+Create Date: 2025-02-10 04:45:46.336174
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import pgvector
+from sqlalchemy import table, column, String, text
+from sqlalchemy.dialects import postgresql
+from sqlalchemy.exc import SQLAlchemyError
+
+# revision identifiers, used by Alembic.
+revision = '6857672e8164'
+down_revision = '209ae2db55f0'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    connection = op.get_bind()
+    table_name = 'specialist'
+    try:
+        result = connection.execute(
+            text(f"""
+                        UPDATE {table_name}
+                        SET type_version = '1.0.0'
+                        WHERE type_version IS NULL OR type_version = ''
+                    """)
+        )
+        print(f"Updated {result.rowcount} rows for type_version in {table_name}")
+    except SQLAlchemyError as e:
+        print(f"Error updating type_version in {table_name}: {str(e)}")
+        raise
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###

migrations/tenant/versions/b9cc547a0512_add_version_type_to_retriever_model.py

@@ -0,0 +1,29 @@
+"""Add version_type to Retriever model
+
+Revision ID: b9cc547a0512
+Revises: efcd6a0d2989
+Create Date: 2025-01-24 06:56:33.459264
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import pgvector
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = 'b9cc547a0512'
+down_revision = 'efcd6a0d2989'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('retriever', sa.Column('type_version', sa.String(length=20), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('retriever', 'type_version')
+    # ### end Alembic commands ###

migrations/tenant/versions/e58835fadd96_update_retriever_type_version_to_1_0_0.py

@@ -0,0 +1,44 @@
+"""Update Retriever type_version to 1.0.0
+
+Revision ID: e58835fadd96
+Revises: 6857672e8164
+Create Date: 2025-02-10 12:20:22.748172
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import pgvector
+from sqlalchemy import text
+from sqlalchemy.dialects import postgresql
+from sqlalchemy.exc import SQLAlchemyError
+
+# revision identifiers, used by Alembic.
+revision = 'e58835fadd96'
+down_revision = '6857672e8164'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    connection = op.get_bind()
+    table_name = 'retriever'
+    try:
+        result = connection.execute(
+            text(f"""
+                            UPDATE {table_name}
+                            SET type_version = '1.0.0'
+                            WHERE type_version IS NULL OR type_version = ''
+                        """)
+        )
+        print(f"Updated {result.rowcount} rows for type_version in {table_name}")
+    except SQLAlchemyError as e:
+        print(f"Error updating type_version in {table_name}: {str(e)}")
+        raise
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    pass
+    # ### end Alembic commands ###