chore: rename cameleer3 to cameleer

Rename Java packages from com.cameleer3 to com.cameleer, module
directories from cameleer3-* to cameleer-*, and all references
throughout workflows, Dockerfiles, docs, migrations, and pom.xml.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docs/superpowers/specs/2026-03-27-interactive-process-diagram-design.md

@@ -37,9 +37,9 @@ Add optional `direction` query parameter to diagram render endpoints.
 
 ### Files
 
-- `cameleer3-server-app/.../diagram/ElkDiagramRenderer.java` — accept direction param, map to ELK `Direction.RIGHT` (LR) or `Direction.DOWN` (TB)
-- `cameleer3-server-core/.../diagram/DiagramRenderer.java` — update interface to accept direction
-- `cameleer3-server-app/.../controller/DiagramRenderController.java` — add `@RequestParam(defaultValue = "LR") String direction` to render endpoints
+- `cameleer-server-app/.../diagram/ElkDiagramRenderer.java` — accept direction param, map to ELK `Direction.RIGHT` (LR) or `Direction.DOWN` (TB)
+- `cameleer-server-core/.../diagram/DiagramRenderer.java` — update interface to accept direction
+- `cameleer-server-app/.../controller/DiagramRenderController.java` — add `@RequestParam(defaultValue = "LR") String direction` to render endpoints
 - `ui/src/api/queries/diagrams.ts` — pass `direction` query param to API calls; also update `DiagramLayout` edge type to match backend `PositionedEdge` serialization: `{ sourceId, targetId, label?, points: number[][] }` (currently defines `{ from?, to? }` which is missing `points` and `label`)
 
 ### Behavior