docs(en): list dashscope in embedding provider table (#1535)

[r266-tech]

#1535 added DashScope (Alibaba Tongyi) as a first-class embedding provider (openviking/models/embedder/dashscope_embedders.py, factory registration in openviking_cli/utils/config/embedding_config.py, validator accepting provider="dashscope" at line 209). The PR also added a full DashScope example section further down in docs/en/guides/01-configuration.md (lines 303–347).

The Dense Embedding parameters quick-reference table at line 122 still enumerates only the six legacy providers and does not mention dashscope, so a reader scanning the parameter table has no hint that DashScope is a valid provider value until they scroll another ~180 lines down.

docs/zh/guides/01-configuration.md (line 124) already lists dashscope in the equivalent zh table, so this is a pure EN/ZH parity + config-source-of-truth fix (embedding_config.py:40 lists dashscope among the 12 valid providers).

Change

docs/en/guides/01-configuration.md line 122: +1 token ("dashscope") inserted into the provider enum, ordering mirrors zh.

Docs-only, no code logic change.

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🎫 Ticket compliance analysis ✅ 1535 - Fully compliant Compliant requirements: Update English documentation to list DashScope in the embedding provider table

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