#169 Update doc context

[tpwalke2]

No description provided.

[Copilot]

Pull request overview

Updates the repository’s agent-focused documentation to reflect the current main branch state and to record which findings from the 2026-07-11 codebase review have been resolved (and how), keeping the “agent-context” docs aligned with recent hardening work.

Changes:

• Annotated the 2026-07-11 codebase review plan with resolution notes (commit refs, dates, and follow-up issue doc links).
• Refreshed agent-context “Last updated / Verified against” stamps to reference main (a62aaf1).
• Expanded agent-context reference docs (testing, core pipeline, config/persistence) with updated behavior descriptions and new/updated test coverage notes.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
plans/codebase-review-2026-07-11.md	Adds “Resolved/Reviewed” follow-up notes for multiple findings, including commit references and links to follow-up issue docs.
agent-context/README.md	Updates verification stamp to current branch/commit.
agent-context/context/testing.md	Updates coverage inventory and references to new/updated tests and behaviors.
agent-context/context/core-pipeline.md	Updates pipeline documentation to match current implementations (e.g., sentinel constants, group-change action, ordering notes).
agent-context/context/config-and-persistence.md	Updates config loading and persistence/migration documentation to reflect recent hardening changes.

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