fix: add custom fields for pmeta stream (#1280)

add p_custom_field -
p_user_agent = parseable
p_format = pmeta

changed user_agent_key to `parseable` to keep 
it consistent with the user_agent_key used in kafka (all lowercase)

Signed-off-by: Nikhil Sinha <131262146+nikhilsinhaparseable@users.noreply.github.com>

---------

Signed-off-by: Nikhil Sinha <131262146+nikhilsinhaparseable@users.noreply.github.com>

Author: nikhilsinhaparseable

src/handlers/http/ingest.rs

@@ -26,10 +26,10 @@ use chrono::Utc;
 use http::StatusCode;
 use serde_json::Value;
 
-use crate::event;
 use crate::event::error::EventError;
 use crate::event::format::known_schema::{self, KNOWN_SCHEMA_LIST};
 use crate::event::format::{self, EventFormat, LogSource, LogSourceEntry};
+use crate::event::{self, FORMAT_KEY, USER_AGENT_KEY};
 use crate::handlers::{EXTRACT_LOG_KEY, LOG_SOURCE_KEY, STREAM_NAME_HEADER_KEY};
 use crate::metadata::SchemaVersion;
 use crate::option::Mode;
@@ -124,7 +124,9 @@ pub async fn ingest_internal_stream(stream_name: String, body: Bytes) -> Result<
     let size: usize = body.len();
     let json: Value = serde_json::from_slice(&body)?;
     let schema = PARSEABLE.get_stream(&stream_name)?.get_schema_raw();
-
+    let mut p_custom_fields = HashMap::new();
+    p_custom_fields.insert(USER_AGENT_KEY.to_string(), "parseable".to_string());
+    p_custom_fields.insert(FORMAT_KEY.to_string(), LogSource::Pmeta.to_string());
     // For internal streams, use old schema
     format::json::Event::new(json)
         .into_event(
@@ -136,7 +138,7 @@ pub async fn ingest_internal_stream(stream_name: String, body: Bytes) -> Result<
             None,
             SchemaVersion::V0,
             StreamType::Internal,
-            &HashMap::new(),
+            &p_custom_fields,
         )?
         .process()?;