Revise TODO.md with new and completed tasks

Updated TODO list with new tasks and removed completed items.

Author: Miyamura80

TODO.md

@@ -7,16 +7,17 @@
 
 ## Code Quality
 
-### High Priority
 
-- [x] Broad exception handling in `src/utils/logging_config.py:64` - catches all exceptions indiscriminately
-- [x] Validator anti-pattern in `common/global_config.py:188-198` - validators ignore input parameter `v`
-- [x] Circular import risk in `common/flags.py:6-7` - `setup_logging()` called at import time
-- [x] Broad exceptions in `utils/llm/dspy_langfuse.py:280,321,438` - catches generic `Exception`
-- [x] Unsafe exception re-instantiation in `src/utils/logging_config.py:61-71` - reconstructs exceptions unsafely
 
 ### Medium Priority
 
 - [ ] Type ignore comments in `utils/llm/dspy_langfuse.py` - indicates type system gaps
 - [ ] Limited test coverage for `init/`, `utils/llm/` directories
 - [ ] Feature flag not checked in all fallback paths
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+
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+### `saas` branch only 
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+- [ ] Add loops.so for user tracking
+- [ ] Add posthog for product analytics