Move configuration item table from meta.db to a separate file

[footka]

Environment

(Required) Please provide the output of bin/observer -V. If this test also involves a version change for obproxy, please also provide the output of obproxy -V.

Mapping relationship for the properties on the right side: "Target Branch" and "Iteration".

Description

This issue proposes moving the configuration item table out of the meta.db file and into a separate, independent file.

Steps to Reproduce

This is a deterministic issue (必现).

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