Flesh out my_secrets instructions for picam with comprehensive setup guide

[Copilot]

Overview

This PR addresses the lack of detailed instructions for configuring the my_secrets.py file in the picam module. Previously, users were left with minimal guidance on how to obtain and configure the required variables for YouTube streaming functionality.

Changes Made

Enhanced my_secrets_example.py

• Added comprehensive comments explaining each configuration variable's purpose and requirements
• Included practical examples for CAM_NAME and WORKFLOW_NAME
• Added critical warning about WORKFLOW_NAME uniqueness to prevent stream conflicts (addresses WORKFLOW_NAME for AWS Lambda function for streaming can't be identical #290)
• Referenced the streamingLambda repository for Lambda function setup
• Improved camera orientation setting descriptions with technical details

Expanded README.md Secrets Section

• Lambda Function Setup: Step-by-step instructions for deploying the streamingLambda service and obtaining the Function URL
• Variable Documentation: Detailed explanations for each required configuration variable with examples
• Critical Warnings: Emphasized the importance of unique workflow names to prevent broadcast conflicts
• Privacy Recommendations: Guidance on choosing appropriate YouTube privacy settings for lab monitoring
• Related Resources: Links to streamingLambda repository, relevant GitHub issues, and example streams

Key Improvements

1. Clear Setup Path: Users now have a complete guide from AWS deployment to camera configuration
2. Conflict Prevention: Addresses workflow naming conflicts identified in WORKFLOW_NAME for AWS Lambda function for streaming can't be identical #290 that can cause streams to interfere with each other
3. Practical Examples: Real-world naming conventions and privacy setting recommendations
4. Reference Links: Direct access to the streamingLambda repository and related documentation

Example Configuration

Before: Users had minimal placeholder values with no context

LAMBDA_FUNCTION_URL = "your_Lambda_function_url"
CAM_NAME = "your_camera_name" 
WORKFLOW_NAME = "your_workflow_name"

After: Users have comprehensive guidance with examples and warnings

# AWS Lambda Function URL - Required for YouTube streaming
# This URL is obtained by deploying the streamingLambda service to AWS.
# See: https://github.com/AccelerationConsortium/streamingLambda
LAMBDA_FUNCTION_URL = "your_Lambda_function_url"

# Workflow Name - Used for organizing streams into playlists
# IMPORTANT: This must be UNIQUE across all devices to avoid conflicts.
# Examples: "SDLT-Toronto-001", "MyLab-Setup-A", "AC-Synthesis-Bench"
# Related issue: https://github.com/AccelerationConsortium/ac-dev-lab/issues/290
WORKFLOW_NAME = "your_workflow_name"

This enhancement significantly improves the user experience for setting up Raspberry Pi camera streaming, providing the missing documentation needed to successfully deploy and configure the system.

Fixes #290 (workflow naming requirements)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Flesh out my_secrets instructions for picam</issue_title>
<issue_description>```
Secrets
Make a copy of my_secrets_example.py called my_secrets.py:

cp my_secrets_example.py my_secrets.py
Fill in the necessary information (e.g., via nano my_secrets.py). Keep in mind this will store the credentials in plain-text format, so try to keep your Pi login secure and restrict the access scope for the credentials as much as possible.

See https://github.com/AccelerationConsortium/ac-dev-lab/blob/main/src/ac_training_lab/picam/device.py and https://github.com/AccelerationConsortium/ac-dev-lab/blob/main/src/ac_training_lab/picam/my_secrets_example.py, noting that there will need to be instructions (can just be a link to the corresponding github issues and especially the [streamingLambda](https://github.com/AccelerationConsortium/streamingLambda) repo). Use your gh mcp tool to look up the right issues and also to explore streamingLambda for additional context.

As always, refer to instructions in .github/copilot-instructions.md</issue_description>

## Comments on the Issue (you are @copilot in this section)

<comments>
</comments>

Fixes #464

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[Copilot]

Pull Request Overview

This PR addresses the lack of detailed setup instructions for the my_secrets.py configuration file in the picam module. The changes provide comprehensive guidance for users to properly configure YouTube streaming functionality, including critical warnings about workflow naming conflicts and step-by-step setup instructions for the required AWS Lambda service.

Key Changes:

• Enhanced my_secrets_example.py with detailed comments explaining each configuration variable
• Expanded README.md with comprehensive setup instructions for Lambda function deployment and variable configuration
• Added critical warnings about workflow name uniqueness to prevent stream conflicts

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
src/ac_training_lab/picam/my_secrets_example.py	Added comprehensive comments with examples and warnings for all configuration variables
src/ac_training_lab/picam/README.md	Added detailed "Required Configuration Variables" section with setup steps, examples, and related resources