[wcislom]

Summary

Final polish of the MVP: the README describes what was built, run-local.sh applies the EF migrations, the docs
describe only what exists, and CI checks formatting.

Docs

• README rewritten for a reviewer: observability section with a trace screenshot from the Aspire Dashboard,
  testing (acceptance scenarios, unit tests, CI, offline prompt evaluation), ADR table, known limitations,
  one-time setup for a manual run (deploy/.env, connection string in user secrets), license note.
  The "work in progress" status is gone.
• Teamtailor webhook signature v2 removed from the docs. It was never implemented, so docs, rules,
  acceptance scenarios (I3, I4) and ADRs 003 and 004 no longer describe it. They come back together with the
  implementation. Teamtailor's own signature format stays documented in .claude/rules/teamtailor.md.
• architecture.md: dotnet-tools.json added to the repository layout; the public surface of
  Infrastructure.Teamtailor lists only what exists (IWebhookParser and its result).
• CLAUDE.md: the EF migration command points to the tool manifest instead of "verify once the first
  DbContext exists".
• ADR 004: removed the leftover TODO: confirm this rationale.; the rationale itself is unchanged.
• diagrams.md, e2e.http: span names as exported, link to the screenshot, setup steps via run-local.sh.

Local run

• deploy/run-local.sh restores dotnet-ef and applies pending migrations for all three DbContexts after
  the build and before the hosts start, so neither the relay nor a worker meets a missing table.

CI and formatting

• .editorconfig: spaces, indent 4 (2 for project, JSON and YAML files), final newline, no trailing whitespace.
  end_of_line is unset because the index holds LF and Windows checkouts get CRLF through core.autocrlf.
  charset is unset because dotnet ef writes migrations with a BOM.
• CI Build job: new step dotnet format --verify-no-changes, which fails the PR on unformatted code.
• Code: two is SqlException { Number: ... } patterns reformatted, the only existing dotnet format findings.
  Forward-looking TODO and doc comments about the signature removed. No behaviour change.