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/VLLM Overview.md

@@ -140,7 +140,7 @@ curl http://localhost:8000/v1/chat/completions \
 | `tensor_parallel_size` | 1 | Number of GPUs for tensor parallelism |
 | `pipeline_parallel_size` | 1 | Number of GPUs for pipeline parallelism |
 | `gpu_memory_utilization` | 0.92 | Fraction of GPU memory for KV cache |
-| `swap_space` | removed | Removed in current vLLM; use `--kv-offloading-size` |
+| `swap_space` | — | retired; the live CPU-KV-offload knob pair is in [[RAM CPU Offloading in VLLM]] |
 | `enforce_eager` | false | Use eager mode (no CUDA graphs) |
 | `max_num_batched_tokens` | 2048 | Max tokens per batch |
 | `max_num_seqs` | 128 | Max sequences per batch |
@@ -167,7 +167,7 @@ curl http://localhost:8000/v1/chat/completions \
 | Argument | Default | Description |
 |----------|---------|-------------|
 | `gpu_memory_utilization` | 0.92 | Fraction of GPU memory for KV cache |
-| `swap_space` | removed | Removed in current vLLM; use `--kv-offloading-size` |
+| `swap_space` | — | retired; the live CPU-KV-offload knob pair is in [[RAM CPU Offloading in VLLM]] |
 | `kv_cache_dtype` | auto | KV cache data type (auto, fp8, fp8_e5m2) |
 | `max_model_len` | auto | Maximum context length |
 | `num_gpu_blocks` | auto | Number of GPU blocks |