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/DFlash DSpark Speculative Decoding.md

@@ -411,7 +411,7 @@ measurement that would settle it.
 
 - Speculative decoding helps low-QPS, memory-bound, latency-focused workloads. It helps less at high QPS.
 - DFlash needs a non-causal attention backend; the ROCm flash_attn backend must be validated before production use.
-- The old `--swap-space` flag no longer exists in current vLLM. Use `--kv-offloading-size`.
+- The old `--swap-space` flag is retired; the live CPU-KV-offload knob pair is owned by [[RAM CPU Offloading in VLLM]].
 - `--speculative-config` is the preferred CLI. Legacy `--spec-method`, `--spec-model`, and `--spec-tokens` flags still exist.
 - Use `rejection_sample_method` default `strict` for lossless output.