oracle-数据字典兼容

[unknowissue]

增加了Oracle的数据字典展示和导出功能

[codecov]

Codecov Report

Merging #1351 (4b61051) into master (ca10a8f) will decrease coverage by 0.14%.
The diff coverage is 51.69%.

@@            Coverage Diff             @@
##           master    #1351      +/-   ##
==========================================
- Coverage   75.39%   75.24%   -0.15%     
==========================================
  Files          81       82       +1     
  Lines       12615    12927     +312     
==========================================
+ Hits         9511     9727     +216     
- Misses       3104     3200      +96     

Impacted Files	Coverage Δ
sql/tests.py	98.97% <36.84%> (-1.03%)	⬇️
sql/data_dictionary.py	71.51% <54.54%> (-28.49%)	⬇️
sql/models.py	95.64% <0.00%> (ø)
sql/engines/clickhouse.py	71.20% <0.00%> (ø)
sql/engines/tests.py	99.83% <0.00%> (+0.01%)	⬆️

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[unknowissue]

Oracle的字段还需要再补充一下，以及Oracle的测试ci，晚点写。

[unknowissue]

我还没写 mock ，我想想。
mock好麻烦。

[unknowissue]

咦，oracle_test_export_db 和 oracle_test_export_instance 这两项咋不测试呢。。。

[unknowissue]

嘶， oracle_test_export_db 和 oracle_test_export_instance 不测试
唔，就这样吧。。。
谁拉取测试看看吧。

[hhyo]

指定下版本，避免出现不兼容的升级

[unknowissue]

指定下版本，避免出现不兼容的升级

好了