feat: add amendments/vote endpoint (#134)

## High Level Overview of Change

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Add an api endpoint to retrieve lists of enabled and voting amendments
for a network.
Also, add functionality to manually edit amendments from db.
Cache time for APIs are now controlled by a constant `CACHE_INTERVAL_MILLIS`.

### Type of Change

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Please check relevant options, delete irrelevant ones.
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- [ ] Bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Refactor (non-breaking change that only restructures code)
- [ ] Tests (You added tests for code that already exists, or your new
feature included in this PR)
- [ ] Documentation Updates
- [ ] Release

## Test Plan

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provide instructions so that others can reproduce.
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Test on staging for a few days.

---------

Co-authored-by: Mayukha Vadari <[email protected]>
Co-authored-by: Caleb Kniffen <[email protected]>

Author: 3 people

ARCHITECTURE.md

@@ -7,7 +7,6 @@ There are 3 folders in `src`, corresponding to the 3 processes that the VHS runs
 * `connection-manager` manages the connections to rippled, and listens to validation and manifest streams.
 * `crawler` finds validators and overlay nodes.
 
-
 ## API Endpoints
 
 * `/`: Information about the endpoints.
@@ -24,8 +23,9 @@ There are 3 folders in `src`, corresponding to the 3 processes that the VHS runs
   * `/network/validator/:publicKey/manifests`: Returns the manifests of a specific validator.
   * `/network/validator/:publicKey/reports`: Returns more detailed information about the reliability of a specific validator.
   * `/network/amendments/info`: Returns general information about known amendments.
-  * `/network/amendments/info/:param`: Returns general information about a specific amendment by name or ID.
-
+  * `/network/amendments/vote/:network`: Returns list of enabled and in voting amendments on a specific network.
+  * `/network/amendment/info/:nameOrID`: Returns general information about a specific amendment by name or ID.
+  * `/network/amendment/vote/:network/:nameOrID`: Returns the voting status of a specific amendment by name or ID.
 
 ## SQL Table Schemas
 
@@ -75,6 +75,7 @@ This table keeps track of how reliable validators have been, on an hourly level.
 | `start`              |The time that the data starts.         |
 | `agreement`          |Data about the reliability of the node.|
 
+
 ### `location`
 
 This table keeps track of the physical location of all of the nodes that the network is aware of.
@@ -108,6 +109,7 @@ This table keeps track of the manifests of the validators.
 | `revoked`            |Whether the manifest has been revoked.                      |
 | `seq`                |The sequence number of this manifest.                       |
 
+
 ### `amendments_enabled`
 
 This table keeps track of the amendments enabled on each network.
@@ -120,6 +122,7 @@ This table keeps track of the amendments enabled on each network.
 | `tx_hash`            |The transaction hash where the amendment has been enabled.|
 | `date`               |The date and time when the amendment has been enabled.    |
 
+
 ### `amendments_info`
 
 This table keeps track of the general information of all known amendments.
@@ -131,17 +134,18 @@ This table keeps track of the general information of all known amendments.
 | `rippled_version`    |The rippled version when the amendment is first enabled     |
 | `deprecated`         |Whether the amendment has been deprecated/retired           |
 
+
 ### `ballot`
 
 This table keeps track of the most current voting data for the validators.
 
-| Key                  | Definition                                                        |
-|----------------------|-------------------------------------------------------------------|
-| `signing_key`        |The signing key of the validator.                                  |
-| `ledger_index`       |The most recent ledger index where voting data was retrieved.      |
-| `amendments`         |The amendments this validator wants to be added to the protocol.   |
-| `base_fee`           |The unscaled transaction cost this validator wants to set.         |
-| `reserve_base`       |The minimum reserve requirement this validator wants to set.       |
+| Key                  | Definition                                                          |
+|----------------------|---------------------------------------------------------------------|
+| `signing_key`        |The signing key of the validator.                                    |
+| `ledger_index`       |The most recent ledger index where voting data was retrieved.        |
+| `amendments`         |The amendments this validator wants to be added to the protocol.     |
+| `base_fee`           |The unscaled transaction cost this validator wants to set.           |
+| `reserve_base`       |The minimum reserve requirement this validator wants to set.         |
 | `reserve_inc`        |The increment in the reserve requirement this validator wants to set.|