Update tech_docs/AWS_Lambda_for_Amazon_Connect_Survey_Processing.md

tech_docs/AWS_Lambda_for_Amazon_Connect_Survey_Processing.md

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+Below is a **concise reaction** to the very thorough peer review you provided, plus a **“next-step” checklist** that distills everything into one developer-day of focused refactoring.  Think of it as the TL;DR that actually fits on a sticky-note.
+
+---
+
+## 1. High-level Reaction  
+Your review is excellent—every major pain point is called out and backed by concrete examples.  
+The only thing I’d add is **risk priority**:  
+- **P0 (can page at 3 a.m.)** – silent duplicate writes, unbounded SES calls.  
+- **P1 (tech-debt)** – monolith, globals, hard-codes.  
+- **P2 (polish)** – PEP-8, type hints, tests.
+
+---
+
+## 2. One-Day Refactor Plan
+
+| Step | Task | Impact | LOC Change |
+|------|------|--------|------------|
+| 1 | Replace all `print()` with `logging.getLogger(__name__)` | Observability | ~25 |
+| 2 | Extract `decode_kinesis_record` + `validate_survey` + `store_survey` + `enrich_agent` | Testability | +120 / –80 |
+| 3 | Move constants to top-level `Config` dataclass | Maintainability | +30 |
+| 4 | Add `ConditionExpression="attribute_not_exists(ContactID)"` on `put_item` | Idempotency | +1 |
+| 5 | Replace global AWS clients with a `Clients` dataclass injected via handler arg | Unit tests | +40 |
+| 6 | Run `black`, `isort`, `flake8`, add `mypy --strict` baseline | Style | auto |
+| 7 | Add one happy-path unit test with `moto` and `pytest` | Confidence | +60 |
+
+Total effort ≈ **4–6 hrs** if you TDD the new functions first.
+
+---
+
+## 3. Micro-gotchas to Fix While You’re There
+- Remove duplicate key `"statuscode"` in response dict.  
+- `str(data)` already handles `str` and non-`str`; delete the verbose ternary.  
+- `ZoneInfo(timeZone)` → `ZoneInfo(os.getenv("TZ", "America/New_York"))`.
+
+---
+
+## 4. Quick Safety Net
+Add this **top-level alarm** in CloudWatch if you don’t already have it:
+
+```
+MetricName = "Lambda Errors"
+Namespace = "AWS/Lambda"
+Dimensions = [FunctionName = <this-lambda>]
+Threshold = 1
+```
+
+---
+
+Land the seven bullets above and you’ll have a **B+ production Lambda** that is testable, observable, and idempotent—without a full rewrite.
+
+---
+
 ### **Code Review: AWS Lambda for Amazon Connect Survey Processing**
 
 This document provides a peer code review of the provided Python script for an AWS Lambda function.