perf(build): faster Maven + UI + CI pipelines

- Maven: enable useIncrementalCompilation; Surefire forkCount=1C +
  reuseForks=true so unit-test JVMs are reused per CPU core instead of
  spawning per class (205 tests pass under the new strategy).
- Testcontainers: opt-in reuse via .withReuse(true) on Postgres +
  ClickHouse base; per-developer enable via ~/.testcontainers.properties.
- UI: drop redundant `tsc --noEmit` from `npm run build` (Vite already
  type-checks); split into a dedicated `npm run typecheck` script.
- CI: cache ~/.npm and ui/node_modules/.vite alongside Maven; npm ci with
  --prefer-offline --no-audit --fund=false; paths-ignore for docs-only,
  .planning/ and .claude/ changes so doc-only pushes skip the pipeline.
- Docs: CLAUDE.md + .claude/rules/cicd.md updated with the new build
  knobs and the Testcontainers reuse opt-in.

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

CLAUDE.md

@@ -22,8 +22,19 @@ Cameleer Server — observability server that receives, stores, and serves Camel
 ```bash
 mvn clean compile          # Compile all modules
 mvn clean verify           # Full build with tests
+mvn clean verify -DskipITs # Fast: unit tests only (no Testcontainers)
 ```
 
+### Faster local builds
+
+- **Surefire reuses forks** (`cameleer-server-app/pom.xml`): unit tests run with `forkCount=1C` + `reuseForks=true` — one JVM per CPU core, reused across classes. Test classes that mutate static state must clean up after themselves.
+- **Testcontainers reuse** — opt-in per developer. Add to `~/.testcontainers.properties`:
+  ```
+  testcontainers.reuse.enable=true
+  ```
+  Then `AbstractPostgresIT` containers persist across `mvn verify` runs (saves ~20s per run). Stop them manually when you need a clean DB: `docker rm -f $(docker ps -aq --filter label=org.testcontainers.reuse=true)`.
+- **UI build** dropped redundant `tsc --noEmit` from `npm run build` (Vite/esbuild type-checks during bundling). Run `npm run typecheck` explicitly when you want a full type-check pass.
+
 ## Run
 
 ```bash
@@ -85,7 +96,7 @@ When adding, removing, or renaming classes, controllers, endpoints, UI component
 <!-- gitnexus:start -->
 # GitNexus — Code Intelligence
 
-This project is indexed by GitNexus as **cameleer-server** (9318 symbols, 23997 relationships, 300 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
+This project is indexed by GitNexus as **cameleer-server** (9321 symbols, 24004 relationships, 300 execution flows). Use the GitNexus MCP tools to understand code, assess impact, and navigate safely.
 
 > If any GitNexus tool warns the index is stale, run `npx gitnexus analyze` in terminal first.