GT AI OS Community v2.0.33 - Add NVIDIA NIM and Nemotron agents

- Updated python_coding_microproject.csv to use NVIDIA NIM Kimi K2
- Updated kali_linux_shell_simulator.csv to use NVIDIA NIM Kimi K2
  - Made more general-purpose (flexible targets, expanded tools)
- Added nemotron-mini-agent.csv for fast local inference via Ollama
- Added nemotron-agent.csv for advanced reasoning via Ollama
- Added wiki page: Projects for NVIDIA NIMs and Nemotron

scripts/postgresql/migrations/T007_optimize_queries.sql

@@ -0,0 +1,61 @@
+-- T007_optimize_queries.sql
+-- Phase 1 Performance Optimization: Composite Indexes
+-- Creates composite indexes for common query patterns to improve performance
+-- Estimated improvement: 60-80% faster conversation and message queries
+
+BEGIN;
+
+-- Apply to all existing tenant schemas
+DO $$
+DECLARE
+    tenant_schema TEXT;
+BEGIN
+    FOR tenant_schema IN
+        SELECT schema_name
+        FROM information_schema.schemata
+        WHERE schema_name LIKE 'tenant_%' AND schema_name != 'tenant_template'
+    LOOP
+        -- Composite index for message queries
+        -- Optimizes: SELECT * FROM messages WHERE conversation_id = ? ORDER BY created_at
+        -- Common in: conversation_service.get_messages() with pagination
+        -- Impact: Covers both filter and sort in single index scan
+        EXECUTE format('
+            CREATE INDEX IF NOT EXISTS idx_messages_conversation_created
+              ON %I.messages
+              USING btree (conversation_id, created_at ASC)
+        ', tenant_schema);
+
+        -- Composite index for conversation list queries
+        -- Optimizes: SELECT * FROM conversations WHERE user_id = ? AND is_archived = false ORDER BY updated_at DESC
+        -- Common in: conversation_service.list_conversations()
+        -- Impact: Enables index-only scan for conversation lists
+        EXECUTE format('
+            CREATE INDEX IF NOT EXISTS idx_conversations_user_updated
+              ON %I.conversations
+              USING btree (user_id, is_archived, updated_at DESC)
+        ', tenant_schema);
+
+        RAISE NOTICE 'Applied T007 optimization indexes to schema: %', tenant_schema;
+    END LOOP;
+END $$;
+
+COMMIT;
+
+-- Performance Notes:
+-- - Both indexes support common access patterns in the application
+-- - No schema changes - purely additive optimization
+-- - Safe to run multiple times (IF NOT EXISTS)
+-- - Note: CONCURRENTLY cannot be used inside DO $$ blocks
+--
+-- Rollback (if needed):
+-- DO $$
+-- DECLARE tenant_schema TEXT;
+-- BEGIN
+--     FOR tenant_schema IN
+--         SELECT schema_name FROM information_schema.schemata
+--         WHERE schema_name LIKE 'tenant_%' AND schema_name != 'tenant_template'
+--     LOOP
+--         EXECUTE format('DROP INDEX IF EXISTS %I.idx_messages_conversation_created', tenant_schema);
+--         EXECUTE format('DROP INDEX IF EXISTS %I.idx_conversations_user_updated', tenant_schema);
+--     END LOOP;
+-- END $$;