Apollo Places: enrich insights with personal place name + notes

Optional integration with the sibling Apollo project's user-defined
Places (name + lat/lon + radius_m + description + category). When
APOLLO_API_BASE_URL is set, the per-photo location resolver folds the
most-specific containing Place into the LLM prompt's location string —
"Home (My house in Cambridge) — near Cambridge, MA" rather than the
city name alone. Smallest-radius wins; Apollo sorts server-side via
/api/places/contains, so the carousel badge in Apollo and the prompt
string here always agree.

Adds an agentic tool `get_personal_place_at(latitude, longitude)` that
the LLM can call during chat continuation. Tool description tells the
model the call returns the user's free-text notes, not just a name.
Deliberately narrow — no enumerate-all variant, lat/lon required.

Unset APOLLO_API_BASE_URL = legacy Nominatim-only path, tool is not
registered. 5 s timeout; all errors degrade silently.

Tests: 5 unit tests for compose_location_string (Apollo only, Nominatim
only, both, both-with-description, neither).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/bin/populate_knowledge.rs

@@ -5,6 +5,7 @@ use clap::Parser;
 use log::warn;
 use walkdir::WalkDir;
 
+use image_api::ai::apollo_client::ApolloClient;
 use image_api::ai::{InsightGenerator, OllamaClient, SmsApiClient};
 use image_api::bin_progress;
 use image_api::database::{
@@ -163,6 +164,7 @@ async fn main() -> anyhow::Result<()> {
         std::env::var("SMS_API_URL").unwrap_or_else(|_| "http://localhost:8000".to_string());
     let sms_api_token = std::env::var("SMS_API_TOKEN").ok();
     let sms_client = SmsApiClient::new(sms_api_url, sms_api_token);
+    let apollo_client = ApolloClient::new(std::env::var("APOLLO_API_BASE_URL").ok());
 
     let insight_dao: Arc<Mutex<Box<dyn InsightDao>>> =
         Arc::new(Mutex::new(Box::new(SqliteInsightDao::new())));
@@ -188,6 +190,7 @@ async fn main() -> anyhow::Result<()> {
         ollama,
         None,
         sms_client,
+        apollo_client,
         insight_dao.clone(),
         exif_dao,
         daily_summary_dao,