circular dependency fix in post script logic

server/migrations/20250710201933_create_script_dependencies.sql

@@ -0,0 +1,47 @@
+-- migrations/20250710201933_create_script_dependencies.sql
+
+-- This table stores the dependency graph for table scripts
+-- More efficient design with better indexing
+CREATE TABLE script_dependencies (
+    id BIGSERIAL PRIMARY KEY,
+    
+    -- The script that creates this dependency
+    script_id BIGINT NOT NULL REFERENCES table_scripts(id) ON DELETE CASCADE,
+    
+    -- The table that depends on another (source of dependency)
+    source_table_id BIGINT NOT NULL REFERENCES table_definitions(id) ON DELETE CASCADE,
+    
+    -- The table being depended upon (target of dependency)  
+    target_table_id BIGINT NOT NULL REFERENCES table_definitions(id) ON DELETE CASCADE,
+    
+    -- What type of dependency (for better debugging)
+    dependency_type TEXT NOT NULL CHECK (dependency_type IN ('column_access', 'sql_query', 'indexed_access')),
+    
+    -- Additional context (column name, query snippet, etc.)
+    context_info JSONB,
+    
+    created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    
+    -- Prevent duplicate dependencies for the same script
+    UNIQUE (script_id, source_table_id, target_table_id, dependency_type)
+);
+
+-- Optimized indexes for fast cycle detection
+CREATE INDEX idx_script_deps_source_target ON script_dependencies (source_table_id, target_table_id);
+CREATE INDEX idx_script_deps_by_script ON script_dependencies (script_id);
+CREATE INDEX idx_script_deps_by_target ON script_dependencies (target_table_id);
+
+-- View for easy dependency analysis
+CREATE VIEW dependency_graph AS
+SELECT 
+    sd.source_table_id,
+    sd.target_table_id,
+    st.table_name AS source_table,
+    tt.table_name AS target_table,
+    sd.dependency_type,
+    sd.context_info,
+    s.name AS schema_name
+FROM script_dependencies sd
+JOIN table_definitions st ON sd.source_table_id = st.id
+JOIN table_definitions tt ON sd.target_table_id = tt.id  
+JOIN schemas s ON st.schema_id = s.id;