fix(ci): address PR review — filter comments, trim whitespace, warn on missing scripts

Address all review comments from Hoshe and Tyre on PR #27:
- Remove 2>/dev/null from pre-pr-fixtures (critical: swallowed errors)
- Remove dead _file_type function
- Check 4: error on districts with no locations declared
- Check 5: print advisory message when skipping
- Check 8: cross-file line ID uniqueness (not just per-file)
- Check 9: document D-034 asymmetric relationships in docstring
- Document regex fallback rationale in _scan_knowledge
- Add D-035 decision trace to schema descriptions
- Use concrete protocol version in DEVOPS.md example
- Amend D-035 with focused (9th mood) and greeting (14th situation)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

decisions/content.md

@@ -82,6 +82,7 @@ How narrative, NPCs, and world content are created: content tiers, NPC generatio
 - **Cross-reference:** Dialogue architecture ([D-028](#d-028-dialogue-architecture--tagged-line-pools-with-four-relational-layers))
 - **Raised by:** Gestalt (schema design, Round 1/2), Mellanie (authoring validation, Round 1/2). Converged across both agents in Round 2.
 - **Dissent:** None. Minor consolidations: Mellanie's 8 moods mapped to Gestalt's 8 (different names, same concepts). Mellanie's `crime` topic deliberately excluded (NPCs think of it as `cargo` or `money`).
+- **Amendment (Sprint 8):** `focused` added as 9th mood (used in Kael dialogue at The Terminal and maintenance corridors). `greeting` added as 14th situation (used in PC dialogue pools for initial contact lines). Schema updated to match.
 
 ### D-036: Sova Transit District / Krenn System as v0.1 setting
 - **Date:** 2026-02-11