Polish docs: reorganize pages and clean up AI filler

The docs had grown into a couple of monolith pages (advanced-patterns.md
at 1100 lines, dependencies.md at 540 lines) and production.md was
padded with generic ops advice (capacity planning formulas, blue-green
deployment instructions, Grafana dashboards) that doesn't belong in
project docs.

Reorganization:
- Split advanced-patterns.md into task-behaviors.md, task-patterns.md,
  and observability.md
- Split dependencies.md into dependency-injection.md and moved
  behavioral deps (retries, timeouts, progress, concurrency) into
  task-behaviors.md
- Updated nav, mkdocs.yml, and cross-references accordingly

production.md cleanup:
- Cut Redis Streams Architecture internals (creates implied contracts)
- Cut generic sections: capacity planning, deployment strategies, dead
  letter handling, scaling considerations, monitoring checklist, Grafana
  dashboard, tuning recipes
- Moved CLI strike examples into the Striking section
- Added Signal Handling section for k8s/container orchestrator users
- Removed Error Handling section (already covered in task-behaviors and
  getting-started)

Consistency pass across all docs:
- Removed closing filler paragraphs from task-behaviors.md and
  testing.md
- Fixed "comprehensive" wording in getting-started.md and testing.md
- Updated stale production.md description in getting-started.md nav

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

Author: chrisguidry

.github/workflows/docs.yml

@@ -32,7 +32,7 @@ jobs:
           cache-dependency-glob: "pyproject.toml"
 
       - name: Install dependencies
-        run: uv sync --group docs
+        run: uv sync
 
       - name: Build documentation
         run: uv run zensical build

.readthedocs.yaml

@@ -5,7 +5,7 @@ build:
     python: "3.12"
   commands:
     - pip install uv
-    - uv sync --group docs
+    - uv sync
     - uv run zensical build
     - mkdir -p $READTHEDOCS_OUTPUT/html
     - cp -r site/* $READTHEDOCS_OUTPUT/html/

README.md

@@ -124,7 +124,7 @@ time.
 To work on the documentation locally:
 
 ```bash
-uv sync --group docs
+uv sync
 uv run zensical serve
 ```