refactor(tooling): merge redmine-cli into tooling-cli/redmine

Consolidate the redmine-cli source into tooling-cli/redmine/
(CLI source, Dockerfile, README, AGENTS.md) with all documentation
rewritten to invoke the container via raw docker run and credentials
from the centralized ~/.creds/redmine.env store. No bin/ wrapper, no
system-dependent paths in the docs.

Removes the old redmine-cli/ subdirectory, updates the
KNELCredsManager consumer table, and updates STATUS.md + AGENTS.md
to reference the new location and registry image.

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Assisted-by: Crush:glm-5.2

AGENTS.md

@@ -51,8 +51,8 @@ ALL work performed on this project MUST be documented in [JOURNAL.md](JOURNAL.md
 - **Custom images**: publish to the Gitea container registry at
   `git.knownelement.com/reachableceo/<image>:<tag>` (Docker is pre-authenticated).
 - **Standalone CLI tools**: containerized CLI tools (not MCP/LSP servers) live
-  in their own top-level directory (e.g. `redmine-cli/`). Invoked on-demand via
-  `docker run --env-file .env <image> <command>`, not as long-running services.
+  under `tooling-cli/` (e.g. `tooling-cli/redmine/`). Invoked on-demand via
+  `docker run --env-file ~/.creds/<service>.env <image> <command>`, not as long-running services.
 
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