chore(release): bump workspace to v0.8.34 and clean repo root

- Bump workspace.package.version 0.8.33 -> 0.8.34 across all 14 crates
- Bump npm wrapper version + deepseekBinaryVersion pin
- Update docs/TOOL_SURFACE.md "Current surface" + docs/ARCHITECTURE.md
  current-surface references; historical "removed_in"/"v0.8.33 began
  moving" wording stays as fact
- Update web/lib/facts.generated.ts version pin
- Draft [0.8.34] CHANGELOG section covering the 135 commits since 0.8.33
  (prefix-cache stability, bundled skills, Kitty/Ghostty notifications,
  theme picker, chunked tool dispatch, MCP session-id persistence,
  cost-calc reasoning tokens, and the in-flight internal cleanup)
- Remove stale repo-root development artifacts:
  * TAKEOVER_PROMPT.md (v0.8.6 handoff, 3 minors stale)
  * PROMPT_ANALYSIS.md (v0.8.13-era prompt audit doc)
  * DEPENDENCY_GRAPH.md (claimed monolith layout, predates 14-crate split)
  docs/ARCHITECTURE.md already contains the live crate map.
- Update CONTRIBUTING.md to reference docs/ARCHITECTURE.md for build
  ordering instead of the removed DEPENDENCY_GRAPH.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Cargo.toml

@@ -19,7 +19,7 @@ default-members = ["crates/cli", "crates/app-server", "crates/tui"]
 resolver = "2"
 
 [workspace.package]
-version = "0.8.33"
+version = "0.8.34"
 edition = "2024"
 # Rust 1.88 stabilized `let_chains` in `if`/`while` conditions, which the
 # codebase relies on extensively. Cargo enforces this so users on older