Apply technical requirements (R1, R2, R9, R10, R13)

- R1: Add AWS_REGION to region fallback chain
- R2: Replace openssl rand with /dev/urandom
- R9: Remove Appendix/Generation details from READMEs
- R10: Remove internal references
- R13: Add REVISION-HISTORY.md

Author: mwunderl

tuts/114-amazon-transcribe-gs/README.md

@@ -40,15 +40,3 @@ Transcribe pricing is per second of audio transcribed. This tutorial transcribes
 - [Amazon Transcribe API reference](https://docs.aws.amazon.com/transcribe/latest/APIReference/Welcome.html)
 - [Supported languages](https://docs.aws.amazon.com/transcribe/latest/dg/supported-languages.html)
 - [Amazon Transcribe pricing](https://aws.amazon.com/transcribe/pricing/)
-
----
-
-## Appendix: Generation details
-
-| Field | Value |
-|-------|-------|
-| Generation date | 2026-04-14 |
-| Source script | New, 106 lines |
-| Script test result | EXIT 0, 16s, 6 steps, no issues |
-| Issues encountered | None |
-| Iterations | v1 |

tuts/114-amazon-transcribe-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 114-amazon-transcribe-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/114-amazon-transcribe-gs/amazon-transcribe-gs.sh

@@ -15,7 +15,7 @@ export AWS_DEFAULT_REGION="$REGION"
 ACCOUNT_ID=$(aws sts get-caller-identity --query 'Account' --output text)
 echo "Region: $REGION"
 
-RANDOM_ID=$(openssl rand -hex 4)
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 BUCKET_NAME="transcribe-tut-${RANDOM_ID}-${ACCOUNT_ID}"
 JOB_NAME="tut-job-${RANDOM_ID}"
 

tuts/118-amazon-lex-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 118-amazon-lex-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/118-amazon-lex-gs/amazon-lex-gs.sh

@@ -14,7 +14,7 @@ fi
 export AWS_DEFAULT_REGION="$REGION"
 echo "Region: $REGION"
 
-RANDOM_ID=$(openssl rand -hex 4)
+RANDOM_ID=$(cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 8 | head -n 1)
 BOT_NAME="tut-bot-${RANDOM_ID}"
 ROLE_NAME="lex-tut-role-${RANDOM_ID}"
 

tuts/123-amazon-bedrock-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 123-amazon-bedrock-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/123-amazon-bedrock-gs/amazon-bedrock-gs.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d)
 exec > >(tee -a "$WORK_DIR/bedrock-$(date +%Y%m%d-%H%M%S).log") 2>&1
-REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}
 [ -z "$REGION" ] && echo "ERROR: No region" && exit 1
 export AWS_DEFAULT_REGION="$REGION"
 echo "Region: $REGION"

tuts/149-aws-lakeformation-gs/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 149-aws-lakeformation-gs
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+

tuts/149-aws-lakeformation-gs/aws-lakeformation-gs.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 WORK_DIR=$(mktemp -d); exec > >(tee -a "$WORK_DIR/lf.log") 2>&1
-REGION=${AWS_DEFAULT_REGION:-$(aws configure get region 2>/dev/null)}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
+REGION=${AWS_DEFAULT_REGION:-${AWS_REGION:-$(aws configure get region 2>/dev/null))}; [ -z "$REGION" ] && echo "ERROR: No region" && exit 1; export AWS_DEFAULT_REGION="$REGION"; echo "Region: $REGION"
 echo "Step 1: Getting data lake settings"
 aws lakeformation get-data-lake-settings --query 'DataLakeSettings.{Admins:DataLakeAdmins|length(@),CreateDBDefault:CreateDatabaseDefaultPermissions|length(@)}' --output table
 echo "Step 2: Listing resources"

tuts/212-cloudwatch-list-alarms/REVISION-HISTORY.md

@@ -0,0 +1,8 @@
+# Revision History: 212-cloudwatch-list-alarms
+
+## Shell (CLI script)
+
+### 2026-04-14 v1 published
+- Type: functional
+- Initial version
+