Doc updates for compare_to (#79)

* Make compare_to field required in rules format

Previously compare_to was optional with a default of "base". Now it must
be explicitly specified in all rule definitions, making the change
detection baseline configuration explicit rather than implicit.

Changes:
- Update schema to require compare_to field
- Remove default value from rules parser
- Update documentation to reflect required status
- Add test for missing compare_to validation
- Update all test rule definitions to include compare_to

* Add compare_to field to all existing rule files

All rule files now require the compare_to field. Updated:
- .deepwork/rules/architecture-documentation-accuracy.md
- .deepwork/rules/readme-accuracy.md
- .deepwork/rules/standard-jobs-source-of-truth.md
- .deepwork/rules/version-and-changelog-update.md
- src/deepwork/standard_jobs/deepwork_rules/rules/skill-md-validation.md

Also ran deepwork install to sync changes.

* Update documentation to show compare_to as required

All rule examples in doc/architecture.md and README.md now include
the compare_to field to reflect that it is now required.

---------

Co-authored-by: Claude <noreply@anthropic.com>

Author: nhorton

README.md

@@ -262,6 +262,7 @@ name: Source/Test Pairing
 set:
   - src/{path}.py
   - tests/{path}_test.py
+compare_to: base
 ---
 When source files change, corresponding test files should also change.
 Please create or update tests for the modified source files.
@@ -275,6 +276,7 @@ trigger: "**/*.py"
 action:
   command: "ruff format {file}"
   run_for: each_match
+compare_to: prompt
 ---
 ```
 

doc/architecture.md

@@ -1028,6 +1028,7 @@ name: Source/Test Pairing
 set:
   - src/{path}.py
   - tests/{path}_test.py
+compare_to: base
 ---
 When source files change, corresponding test files should also change.
 Please create or update tests for the modified source files.
@@ -1043,6 +1044,7 @@ Rules support three detection modes:
 name: Update install guide
 trigger: "app/config/**/*"
 safety: "docs/install_guide.md"
+compare_to: base
 ---
 ```
 
@@ -1053,6 +1055,7 @@ name: Source/Test Pairing
 set:
   - src/{path}.py
   - tests/{path}_test.py
+compare_to: base
 ---
 ```
 Uses variable patterns like `{path}` (multi-segment) and `{name}` (single-segment) for matching.
@@ -1064,6 +1067,7 @@ name: API Documentation
 pair:
   trigger: src/api/{name}.py
   expects: docs/api/{name}.md
+compare_to: base
 ---
 ```
 
@@ -1074,6 +1078,7 @@ pair:
 ---
 name: Security Review
 trigger: "src/auth/**/*"
+compare_to: base
 ---
 Please check for hardcoded credentials and validate input.
 ```
@@ -1086,6 +1091,7 @@ trigger: "**/*.py"
 action:
   command: "ruff format {file}"
   run_for: each_match  # or "all_matches"
+compare_to: prompt
 ---
 ```