docs: fix architecture tree — add missing source files

[github-actions]

Documentation Freshness Audit

This audit compared the AGENTS.md architecture tree against the actual source files and found three source files that exist in the codebase but were missing from the documented tree.

Findings

Area	Issue	File(s)
AGENTS.md architecture	src/compile/extensions/ado_aw_marker.rs not listed in extensions/	AGENTS.md
AGENTS.md architecture	src/ado/discovery.rs not listed in ado/ directory	AGENTS.md
AGENTS.md architecture	src/update_check.rs not listed in src/	AGENTS.md

Details

src/compile/extensions/ado_aw_marker.rs — The always-on AdoAwMarkerExtension that emits the # ado-aw-meta(redacted) JSON marker step in every compiled pipeline. This is a critical extension: src/detect.rsparses these markers to discover and match compiled pipelines for all lifecycle commands. It was registered inextensions/mod.rsasExtension::AdoAwMarker` but omitted from the documentation tree.

src/ado/discovery.rs — The Preview-driven pipeline discovery module that powers the --all-repos and --source flags on secrets set/list/delete. This module calls ADO's Pipeline Preview API per definition and scans the expanded YAML for ado-aw-marker steps. It is a substantial module mentioned in the project but absent from the tree.

src/update_check.rs — A background task spawned on every CLI invocation that checks GitHub Releases for a newer version of ado-aw and prints an advisory if one is found.

Applied Fixes

• Added ado_aw_marker.rs to the extensions/ listing in the AGENTS.md architecture tree
• Expanded the ado/ directory entry to show both mod.rs and discovery.rs
• Added update_check.rs to the root src/ listing

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This pull request was created by the automated documentation freshness check.

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Protected Files

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Protected files

• AGENTS.md

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