docs(vault): consolidate the vLLM offload-knob claim to one owner (C2, C6)

The "`--swap-space` is removed; use `--kv-offloading-size`" claim was carried by
six pages, two of them with their own copy of the upstream source citation. It
now lives only in [[RAM CPU Offloading in VLLM]], which carries the 2026-10-19
verification against `vllm/config/cache.py` (no `swap_space`; `kv_offloading_size`
activates only with `kv_offloading_backend`):

- `VLLM Overview` (two argument tables), `VLLM Index` (parameter table),
  `DFlash DSpark Speculative Decoding`, `Shared Memory Architecture Dankclaw`,
  `Hybrid CPU GPU Processing Dankserver` -> cite the owner.
- `VLLM Index`'s example command used the dead flag; it now shows the live pair.
- `dankserver-vram-growth`: banner disambiguates the 2026-08 `frank-zealot`
  (llama.cpp on the 3090 when that card was in Dankserver) from today's endpoint
  of the same name on Dankclaw, so a retired crash signature does not read as a
  live fault on a same-card-class service.

Refs: vault de-dup campaign, clusters C2 and C6.

serverAppConfigs-docs/LLM/Hybrid CPU GPU Processing Dankserver.md

@@ -56,7 +56,10 @@ Lower values leave more GPU memory for KV cache. This reduces swap frequency.
 
 ### Swap Space / KV Offload
 
-Recent vLLM releases removed the `--swap-space` engine argument — `CacheConfig` on `main` has no `swap_space` field ([source](https://raw.githubusercontent.com/vllm-project/vllm/main/vllm/config/cache.py), read 2026-10-18). Use `--kv-offloading-size` (`kv_offloading_size`, same file) to move KV cache to CPU RAM. In Podman, mount the host cache read-write for KV offload writes. The table below shows historical `--swap-space` guidance as a sizing reference.
+Current vLLM has no `--swap-space` engine argument, and the CPU KV-offload knob pair
+is owned by [[RAM CPU Offloading in VLLM]] (that page carries the upstream
+`CacheConfig` verification). In Podman, mount the host cache read-write for KV offload
+writes. The table below shows historical `--swap-space` guidance as a sizing reference.
 
 | System RAM | Recommended Swap |
 |------------|------------------|