Rename doc-* mise tasks to docs-check-* / docs-review-* (#113)

## Summary
- Rename 4 automated-check tasks: `doc-titles` → `docs-check-titles`, `doc-filenames` → `docs-check-filenames`, `doc-links` → `docs-check-links`, `doc-index` → `docs-check-index`
- Rename 3 interactive-review tasks: `doc-random` → `docs-review-random`, `doc-tags` → `docs-review-tags`, `doc-stale` → `docs-review-stale`
- Update all references in `.pre-commit-config.yaml`, `ai-assistance-guide.md`, and `review-documentation.md`
- Historical changelog entries left as-is

## Test plan
- [x] `mise run docs-check-titles` exits 0
- [x] `mise run docs-check-links` exits 0
- [x] `mise run docs-review-tags` exits 0
- [x] `mise run doc-titles` fails with "no task found"
- [x] All pre-commit hooks pass (including renamed hook IDs)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Reviewed-on: https://forge.ops.eblu.me/eblume/blumeops/pulls/113

mise-tasks/docs-check-filenames

@@ -13,7 +13,7 @@ cause wiki-link resolution issues.
 With Quartz, wiki-links like [[filename]] resolve by filename,
 so filenames must be unique across the documentation.
 
-Usage: mise run doc-filenames
+Usage: mise run docs-check-filenames
 """
 
 import sys

mise-tasks/docs-check-index

@@ -14,7 +14,7 @@ target (e.g., alloy.md is matched by [[alloy]]) in the category index.
 
 Index files are excluded from the self-check.
 
-Usage: mise run doc-index
+Usage: mise run docs-check-index
 """
 
 import re

mise-tasks/docs-check-links

@@ -17,7 +17,7 @@ Wiki-link formats supported:
 Path-based links (containing '/') are NOT supported to ensure all
 filenames are unique and links work correctly in obsidian.nvim.
 
-Usage: mise run doc-links
+Usage: mise run docs-check-links
 """
 
 import re

mise-tasks/docs-check-titles

@@ -15,7 +15,7 @@ so titles must be:
 - Unique across the documentation
 - Lowercase with hyphens (no spaces or uppercase)
 
-Usage: mise run doc-titles
+Usage: mise run docs-check-titles
 """
 
 import re

mise-tasks/docs-review-random

@@ -11,7 +11,7 @@ changelog.d/), selects one at random, and displays it for review.
 
 Useful for periodic knowledge base maintenance and verification.
 
-Usage: mise run doc-random
+Usage: mise run docs-review-random
 """
 
 import random

mise-tasks/docs-review-stale

@@ -12,7 +12,7 @@ threshold (default 180 days) are highlighted as stale.
 
 This is informational only — it always exits 0.
 
-Usage: mise run doc-stale [-- --threshold 90]
+Usage: mise run docs-review-stale [-- --threshold 90]
 """
 
 import subprocess

mise-tasks/docs-review-tags

@@ -12,7 +12,7 @@ docs use each tag.
 
 This is informational only — it always exits 0.
 
-Usage: mise run doc-tags
+Usage: mise run docs-review-tags
 """
 
 import sys