Update documentation to clarify Unicode-only support

[Copilot]

Thanks for assigning this issue to me. I'm starting to work on it and will keep this PR's description up to date as I form a plan and make progress.

Original prompt

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This section details on the original issue you should resolve

<issue_title>P2 🌸➰</issue_title>
<issue_description>
P2: The documentation claims :runner:/:hand: shortcodes are supported, but the workflow only matches the Unicode emoji. This will cause shortcode-formatted tasks to be skipped. Update the docs to reflect Unicode-only support (or extend the workflow).

Prompt for AI agents

Check if this issue is valid — if so, understand the root cause and fix it. At docs/iteration-email-setup.md, line 93:

<comment>The documentation claims `:runner:`/`:hand:` shortcodes are supported, but the workflow only matches the Unicode emoji. This will cause shortcode-formatted tasks to be skipped. Update the docs to reflect Unicode-only support (or extend the workflow).</comment>

<file context>
@@ -0,0 +1,274 @@
+
+### Supported Emoji Formats
+
+Both Unicode emoji and GitHub shortcodes are supported:
+
+- In Progress: `🏃` or `:runner:`
</file context>

Originally posted by @cubic-dev-ai[bot] in JaclynCodes/Symphonic-Joules#182 (comment)
</issue_description>

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

@JaclynCodes Check if this issue is valid — if so, understand the root cause and fix it. At docs/iteration-email-setup.md, line 93:

The documentation claims :runner:/:hand: shortcodes are supported, but the workflow only matches the Unicode emoji. This will cause shortcode-formatted tasks to be skipped. Update the docs to reflect Unicode-only support (or extend the workflow).

@@ -0,0 +1,274 @@ + +### Supported Emoji Formats + +Both Unicode emoji and GitHub shortcodes are supported: + +- In Progress: `🏃` or `:runner:` @

• Fixes P2 🌸➰ #64

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Summary by cubic

Clarified that the iteration email workflow only supports Unicode emoji for status markers, not GitHub shortcodes. Updated the “Supported Emoji Formats” section and examples to use Unicode only to match the workflow and prevent skipped tasks.

^{Written for commit 4cb54e0. Summary will update on new commits.}

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