cleanup: remove prompt orchestrator documentation and vestigial syntax (#1377)

Remove all documentation, procedures, and vestigial syntax for the prompt
orchestrator system deleted in PR #1355 (Oct 9, 2025). The entire template
generation architecture was replaced by Claude Code's native plugin system.

## Files Removed

**Documentation (obsolete):**
- `docs/prompt-orchestration.md` - Described template syntax for deleted orchestrator
- `docs/prompt-orchestrator-security.md` - Security docs for deleted code

**Procedure (obsolete):**
- `knowledge/procedures/command-lifecycle-management.md` - Referenced deleted tools:
  - utils/sync-claude-commands.sh (removed PR #1355)
  - utils/generate-commands.sh (removed PR #1355)
  - .claude/command-templates/ (never existed)

**Artifacts (untracked):**
- `utils/__pycache__/prompt_orchestrator.cpython-312.pyc` - Not in git, removed manually

## Vestigial Syntax Removed

**commands/close-issue.md** - Removed 2 non-functional markers:
- Line 52: `{{ INJECT:principles/tracer-bullets.md }}`
- Line 69: `{{ INJECT:principles/eager-evolution.md }}`

**commands/extract-best-frame.md** - Removed 1 non-functional marker:
- Line 211: `{{ INJECT:principles/tracer-bullets.md }}`

These `{{ INJECT: }}` markers were remnants of the deleted orchestrator's
template processing. They're not processed by any current system - GitHub
Actions only processes `{{ KNOWLEDGE_BASE }}` and local commands don't
process them at all. The principles are already available in context,
making these markers vestigial documentation cruft.

## Updated

**knowledge/principles/systems-stewardship.md:26** - Updated gitignore example:
- Old: Referenced deleted `.claude/command-templates`
- New: References current `mlruns/` (MLflow tracking data)

## Context

The prompt orchestrator (utils/prompt_orchestrator.py) was removed in
commit 688fe9d along with 1,131 lines of template generation tooling.
These docs and syntax markers were orphaned but not removed at the time.

## Impact

- 3 docs files removed (~150 lines)
- 1 procedure removed (42 lines)
- 3 vestigial syntax markers removed
- 1 principle example updated
- Zero functional loss - all referenced deleted systems or non-functional syntax

Related to #1355 (orchestrator removal)
Related to #1352 (plugin system replacement)

Principle: subtraction-creates-value

Author: atxtechbro

commands/close-issue.md

@@ -49,8 +49,6 @@ Complete and implement GitHub issue #{{ ISSUE_NUMBER }}.
 <!-- Contract: Issue context loaded, working in worktree -->
 Build the solution using tracer bullets - get something working first, then iterate.
 
-{{ INJECT:principles/tracer-bullets.md }}
-
 ## Creating the Pull Request
 
 **IMPORTANT**: This procedure outputs a GitHub Pull Request. The PR must be created, not just planned.
@@ -66,8 +64,6 @@ See `.github/PULL_REQUEST_TEMPLATE.md` for complete guidance on title patterns a
 ## Final Step: Retro
 Let's retro this context and wring out the gleanings.
 
-{{ INJECT:principles/eager-evolution.md }}
-
 **Consider capturing any ghost procedures** that emerged during this work - see [Procedure Creation](knowledge/procedures/procedure-creation.md).
 
 **What would you like to focus on?**

commands/extract-best-frame.md

@@ -208,8 +208,6 @@ Display summary of all processed videos:
 !done
 !echo ""
 
-{{ INJECT:principles/tracer-bullets.md }}
-
 ## Next Steps
 
 The best frame extraction is complete!

docs/prompt-orchestration.md

@@ -23,7 +23,7 @@ The principle of maintaining and improving systems through consistent patterns,
 - "Vísteme despacio, que tengo prisa" - move deliberately, not frantically
 - **Never let a crisis go to waste**: Each failure becomes input for stronger procedures and prevention systems
 - **Leave cookie crumbs**: Document architectural decisions inline where future engineers encounter them. Git commit messages fade into history; inline comments create discoverable breadcrumbs for faster resolution.
-- **Gitignore as architectural documentation**: Every gitignore entry embeds meaning about system structure. `# Setup-generated symlinks (avoid duplicating tracked content)` tells the story of why `.claude/command-templates` exists. Each line is a clue to underlying architecture, not just file exclusion.
+- **Gitignore as architectural documentation**: Every gitignore entry embeds meaning about system structure. `# MLflow experiment tracking data (regenerated on each run)` tells the story of why `mlruns/` is excluded. Each line is a clue to underlying architecture, not just file exclusion.
 
 **GitHub Issues as WIP Inventory:**
 - Backlog buildup indicates bottlenecks in the development flow