fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

docs/codex/guidelines.md

@@ -0,0 +1,26 @@
+# Codex Agent Guidelines
+
+This document supplements `AGENTS.md` with Codex-specific working notes. Always treat `AGENTS.md` as the source of truth and keep this file aligned with future updates.
+
+## Core Expectations
+
+- Obtain explicit approval from the project owner before attempting any code change or file edit.
+- Follow every checklist item in `AGENTS.md`, including framework principles, testing strategy, and tooling conventions.
+- Keep documentation edits consistent with project tone (PSR-12 code examples, ASCII character set, precise terminology).
+
+## Workflow Notes
+
+- Prefer small, reviewable steps and clearly report what changed, including file paths and line references.
+- When a task involves multiple steps, draft a lightweight plan unless the work is trivial.
+- Record unanswered questions or ambiguities in the final message so the owner can respond quickly.
+
+## Tooling Reminders
+
+- Use `bash -lc` shell invocations with explicit `workdir` as required by the Codex CLI harness.
+- Rely on `rg` for searches; fall back to alternatives only if `rg` is unavailable.
+- Do not run container or network commands without explicit permission when sandboxed.
+
+## Documentation Maintenance
+
+- Update this file whenever Codex-specific guidance changes so it remains synchronized with the rest of the ecosystem docs (e.g., keep parity with `docs/claude/` where it makes sense).
+- Coordinate with the project owner before introducing new sections or workflows that impact other agents.