**Related Issue(s):**

- Fixes
#345
- Fixes
#344
- Fixes
#336

**Description:**

This PR consists of self-contained commits (except the first commit that
provides database_logic deduplication), making it easy to change or
remove individual patches. It addresses several small issues, improves
the performance of certain methods, and adds support for
dynamically-generated queryables. This enhancement doesn't require any
new configuration as queryables are generated on the fly based on the
os/es mappings. The implementation is designed for extensibility, with
built-in logic for augmenting fields metadata with additional
information. Currently, it only includes the _DEFAULT_QUERYABLES
configuration, which was simply copied from the pre-PR code.

Example queryables response:

```json
{"$schema":"https://json-schema.org/draft/2019-09/schema","$id":"https://stac-api.example.com/queryables","type":"object","title":"Queryables for STAC API","description":"Queryable names for the STAC API Item Search filter.","properties":{"bbox":{"title":"Bbox","type":"number"},"collection":{"description":"Collection","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/definitions/core/allOf/2/then/properties/collection","title":"Collection","type":"string"},"geometry":{"description":"Geometry","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/definitions/core/allOf/1/oneOf/0/properties/geometry","title":"Geometry","type":"object"},"id":{"description":"ID","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/item.json#/definitions/core/allOf/2/properties/id","title":"Id","type":"string"},"stac_extensions":{"title":"Stac Extensions","type":"string"},"stac_version":{"title":"Stac Version","type":"string"},"type":{"title":"Type","type":"string"},"constellation":{"title":"Constellation","type":"string"},"created":{"description":"Creation Timestamp","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/datetime.json#/properties/created","title":"Created","type":"string","format":"date-time"},"datetime":{"description":"Acquisition Timestamp","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/datetime.json#/properties/datetime","title":"Datetime","type":"string","format":"date-time"},"end_datetime":{"title":"End Datetime","type":"string","format":"date-time"},"eopf:datatake_id":{"title":"Eopf:Datatake Id","type":"string"},"eopf:instrument_configuration_id":{"title":"Eopf:Instrument Configuration Id","type":"number"},"instruments":{"title":"Instruments","type":"string"},"platform":{"title":"Platform","type":"string"},"processing:datetime":{"title":"Processing:Datetime","type":"string","format":"date-time"},"processing:facility":{"title":"Processing:Facility","type":"string"},"processing:level":{"title":"Processing:Level","type":"string"},"processing:version":{"title":"Processing:Version","type":"string"},"product:timeliness":{"title":"Product:Timeliness","type":"string"},"product:timeliness_category":{"title":"Product:Timeliness Category","type":"string"},"product:type":{"title":"Product:Type","type":"string"},"published":{"title":"Published","type":"string","format":"date-time"},"sar:center_frequency":{"title":"Sar:Center Frequency","type":"number"},"sar:frequency_band":{"title":"Sar:Frequency Band","type":"string"},"sar:instrument_mode":{"title":"Sar:Instrument Mode","type":"string"},"sar:observation_direction":{"title":"Sar:Observation Direction","type":"string"},"sar:pixel_spacing_azimuth":{"title":"Sar:Pixel Spacing Azimuth","type":"number"},"sar:pixel_spacing_range":{"title":"Sar:Pixel Spacing Range","type":"number"},"sar:polarizations":{"title":"Sar:Polarizations","type":"string"},"sar:resolution_azimuth":{"title":"Sar:Resolution Azimuth","type":"number"},"sar:resolution_range":{"title":"Sar:Resolution Range","type":"number"},"sat:absolute_orbit":{"title":"Sat:Absolute Orbit","type":"integer"},"sat:orbit_cycle":{"title":"Sat:Orbit Cycle","type":"number"},"sat:orbit_state":{"title":"Sat:Orbit State","type":"string"},"sat:platform_international_designator":{"title":"Sat:Platform International Designator","type":"string"},"sat:relative_orbit":{"title":"Sat:Relative Orbit","type":"integer"},"start_datetime":{"title":"Start Datetime","type":"string","format":"date-time"},"updated":{"description":"Creation Timestamp","$ref":"https://schemas.stacspec.org/v1.0.0/item-spec/json-schema/datetime.json#/properties/updated","title":"Updated","type":"string","format":"date-time"},"view:azimuth":{"title":"View:Azimuth","type":"number"},"view:incidence_angle":{"title":"View:Incidence Angle","type":"number"},"auth:schemes.oidc.openIdConnectUrl":{"title":"Auth:Schemes.Oidc.Openidconnecturl","type":"string"},"auth:schemes.oidc.type":{"title":"Auth:Schemes.Oidc.Type","type":"string"},"auth:schemes.s3.type":{"title":"Auth:Schemes.S3.Type","type":"string"},"storage:schemes.cdse-s3.description":{"title":"Storage:Schemes.Cdse-S3.Description","type":"string"},"storage:schemes.cdse-s3.platform":{"title":"Storage:Schemes.Cdse-S3.Platform","type":"string"},"storage:schemes.cdse-s3.requester_pays":{"title":"Storage:Schemes.Cdse-S3.Requester Pays","type":"boolean"},"storage:schemes.cdse-s3.title":{"title":"Storage:Schemes.Cdse-S3.Title","type":"string"},"storage:schemes.cdse-s3.type":{"title":"Storage:Schemes.Cdse-S3.Type","type":"string"},"storage:schemes.creodias-s3.description":{"title":"Storage:Schemes.Creodias-S3.Description","type":"string"},"storage:schemes.creodias-s3.platform":{"title":"Storage:Schemes.Creodias-S3.Platform","type":"string"},"storage:schemes.creodias-s3.requester_pays":{"title":"Storage:Schemes.Creodias-S3.Requester Pays","type":"boolean"},"storage:schemes.creodias-s3.title":{"title":"Storage:Schemes.Creodias-S3.Title","type":"string"},"storage:schemes.creodias-s3.type":{"title":"Storage:Schemes.Creodias-S3.Type","type":"string"}},"additionalProperties":false}
```

PS. I think the auto-generated "title" should be removed completely, but
I included it because I found it to be common practice in some STAC
projects. I'm not sure how you feel about it.

**PR Checklist:**

- [ ] Code is formatted and linted (run `pre-commit run --all-files`)
- [ ] Tests pass (run `make test`)
- [ ] Documentation has been updated to reflect changes, if applicable
- [ ] Changes are added to the changelog

---------

Co-authored-by: Jonathan Healy <jonathan.d.healy@gmail.com>

**Related Issue(s):**

- #

**Description:**


**PR Checklist:**

- [x] Code is formatted and linted (run `pre-commit run --all-files`)
- [x] Tests pass (run `make test`)
- [x] Documentation has been updated to reflect changes, if applicable
- [x] Changes are added to the changelog

**Related Issue(s):**

- #342 
- #343

**Description:**


**PR Checklist:**

- [x] Code is formatted and linted (run `pre-commit run --all-files`)
- [x] Tests pass (run `make test`)
- [x] Documentation has been updated to reflect changes, if applicable
- [x] Changes are added to the changelog