Merged in feature/chatbot1 (pull request #223)

Chatbot functionality

* baseline working

* missing test file

* more tests

internal/database/repository/custommetadata.sql.go

@@ -195,6 +195,82 @@ func (q *Queries) GetCurrentDocumentCustomMetadata(ctx context.Context, document
 	return &i, err
 }
 
+const getCurrentDocumentCustomMetadataForClient = `-- name: GetCurrentDocumentCustomMetadataForClient :one
+SELECT
+    dcm.id,
+    dcm.document_id,
+    dcm.metadata,
+    dcm.version,
+    dcm.created_at,
+    dcm.created_by,
+    cms.id          AS schema_id,
+    cms.name        AS schema_name,
+    cms.version     AS schema_version
+FROM document_custom_metadata dcm
+JOIN documents d ON d.id = dcm.document_id
+LEFT JOIN client_metadata_schemas cms ON cms.id = d.custom_schema_id
+WHERE dcm.document_id = $1
+  AND d.clientId      = $2
+ORDER BY dcm.version DESC
+LIMIT 1
+`
+
+type GetCurrentDocumentCustomMetadataForClientParams struct {
+	DocumentID uuid.UUID `db:"document_id"`
+	ClientID   string    `db:"client_id"`
+}
+
+type GetCurrentDocumentCustomMetadataForClientRow struct {
+	ID            uuid.UUID          `db:"id"`
+	DocumentID    uuid.UUID          `db:"document_id"`
+	Metadata      []byte             `db:"metadata"`
+	Version       int32              `db:"version"`
+	CreatedAt     pgtype.Timestamptz `db:"created_at"`
+	CreatedBy     string             `db:"created_by"`
+	SchemaID      *uuid.UUID         `db:"schema_id"`
+	SchemaName    *string            `db:"schema_name"`
+	SchemaVersion *int32             `db:"schema_version"`
+}
+
+// Chatbot-scoped variant of GetCurrentDocumentCustomMetadata. Same column
+// set (the metadata row decorated with schema id/name/version), but the
+// joined documents row must belong to @client_id; cross-client calls miss
+// with pgx.ErrNoRows. Plan §5.
+//
+//	SELECT
+//	    dcm.id,
+//	    dcm.document_id,
+//	    dcm.metadata,
+//	    dcm.version,
+//	    dcm.created_at,
+//	    dcm.created_by,
+//	    cms.id          AS schema_id,
+//	    cms.name        AS schema_name,
+//	    cms.version     AS schema_version
+//	FROM document_custom_metadata dcm
+//	JOIN documents d ON d.id = dcm.document_id
+//	LEFT JOIN client_metadata_schemas cms ON cms.id = d.custom_schema_id
+//	WHERE dcm.document_id = $1
+//	  AND d.clientId      = $2
+//	ORDER BY dcm.version DESC
+//	LIMIT 1
+func (q *Queries) GetCurrentDocumentCustomMetadataForClient(ctx context.Context, arg *GetCurrentDocumentCustomMetadataForClientParams) (*GetCurrentDocumentCustomMetadataForClientRow, error) {
+	row := q.db.QueryRow(ctx, getCurrentDocumentCustomMetadataForClient, arg.DocumentID, arg.ClientID)
+	var i GetCurrentDocumentCustomMetadataForClientRow
+	err := row.Scan(
+		&i.ID,
+		&i.DocumentID,
+		&i.Metadata,
+		&i.Version,
+		&i.CreatedAt,
+		&i.CreatedBy,
+		&i.SchemaID,
+		&i.SchemaName,
+		&i.SchemaVersion,
+	)
+	return &i, err
+}
+
 const getDocumentClientID = `-- name: GetDocumentClientID :one
 SELECT clientId FROM documents WHERE id = $1
 `
@@ -353,6 +429,34 @@ func (q *Queries) GetDocumentCustomSchemaId(ctx context.Context, id uuid.UUID) (
 	return custom_schema_id, err
 }
 
+const getDocumentCustomSchemaIdForClient = `-- name: GetDocumentCustomSchemaIdForClient :one
+SELECT custom_schema_id
+FROM documents
+WHERE id = $1
+  AND clientId = $2
+`
+
+type GetDocumentCustomSchemaIdForClientParams struct {
+	ID       uuid.UUID `db:"id"`
+	ClientID string    `db:"client_id"`
+}
+
+// Chatbot-scoped variant of GetDocumentCustomSchemaId: adds a clientId
+// filter so cross-client lookups miss with pgx.ErrNoRows. Same scalar
+// result type (nullable uuid) as the non-scoped query — only the WHERE
+// clause differs. Plan §5.
+//
+//	SELECT custom_schema_id
+//	FROM documents
+//	WHERE id = $1
+//	  AND clientId = $2
+func (q *Queries) GetDocumentCustomSchemaIdForClient(ctx context.Context, arg *GetDocumentCustomSchemaIdForClientParams) (*uuid.UUID, error) {
+	row := q.db.QueryRow(ctx, getDocumentCustomSchemaIdForClient, arg.ID, arg.ClientID)
+	var custom_schema_id *uuid.UUID
+	err := row.Scan(&custom_schema_id)
+	return custom_schema_id, err
+}
+
 const getDocumentSchemaBindingForReset = `-- name: GetDocumentSchemaBindingForReset :one
 SELECT
     d.custom_schema_id,