fix(sustainabot): parse-blocking OCaml-isms and HANDLE-keyword name (Refs #148)

Two hand-port corrections after re-validating the ReScript→AffineScript
files against the live `affinescript check`:

1. **OCaml-style float operators** `/.`, `*.`, `+.`, `-.` → AffineScript
   `/`, `*`, `+`, `-`. AffineScript uses unified arithmetic operators
   for both Int and Float (see `examples/lessons/01_hello.affine`:
   `subtotal * 0.08`), so the OCaml separation was a hand-port artefact.
   Affected sites:
   - `GitHubApp.affine`: `Time::now_millis() / 1000.0`,
     `now_seconds - 60.0`, `now_seconds + 600.0`,
     `Time::now_millis() + 60000.0`
   - `Oikos.affine`: `60.0 * 60.0 * 1000.0`, `now - a.createdAt`
   - `Report.affine`: `r.confidence * 100.0`

2. **`handle` is a contextual keyword** (HANDLE token, used in
   `handle body { handlers }` effect expressions) and parses as a token,
   not an ident, so it cannot be a function name. Renamed `Router.affine`
   `pub fn handle(...)` → `pub fn dispatch(...)`. The function dispatches
   a request to its matching route handler, so the rename is also a more
   accurate name. The doc-comment is updated to match.

Result: with these edits + the four parser PRs gated on this issue
(hyperpolymath/affinescript#370, #371, #372, #373, #376), all 13
hand-ported `.affine` files reach Resolution (no parse errors) under
`affinescript check`.

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

Author: hyperpolymath

bots/sustainabot/bot-integration/src/GitHubApp.affine

@@ -61,7 +61,7 @@ pub fn generate_jwt(
   app_id: ref String,
   private_key_pem: ref String,
 ) -{IO}-> Result<String, String> {
-  let now_seconds = Time::now_millis() /. 1000.0;
+  let now_seconds = Time::now_millis() / 1000.0;
 
   let header = json::encode_object([
     ("alg", json::encode_string("RS256")),
@@ -71,8 +71,8 @@ pub fn generate_jwt(
 
   let payload = json::encode_object([
     ("iss", json::encode_string(app_id)),
-    ("iat", json::encode_float(now_seconds -. 60.0)),
-    ("exp", json::encode_float(now_seconds +. 600.0)),
+    ("iat", json::encode_float(now_seconds - 60.0)),
+    ("exp", json::encode_float(now_seconds + 600.0)),
   ]);
   let payload_b64 = base64_url_encode_string(json::stringify(payload));
 
@@ -111,7 +111,7 @@ pub fn get_installation_token(
 
   match cache_get(cache_key) {
     Some(cached) => {
-      if cached.expiresAt > Time::now_millis() +. 60000.0 {
+      if cached.expiresAt > Time::now_millis() + 60000.0 {
         Ok(cached)
       } else {
         fetch_installation_token(jwt, cache_key)

bots/sustainabot/bot-integration/src/Oikos.affine

@@ -194,9 +194,9 @@ pub fn update(msg: Msg, model: Model) -{IO}-> (Model, Cmd::T<Msg>) {
 
     Tick => {
       let now = Time::now_millis();
-      let one_hour = 60.0 *. 60.0 *. 1000.0;
+      let one_hour = 60.0 * 60.0 * 1000.0;
       let pending = filter(model.pendingAnalyses, fn(a) -> Bool {
-        now -. a.createdAt < one_hour
+        now - a.createdAt < one_hour
       });
       (Model #{ ..model, pendingAnalyses: pending }, Cmd::none())
     },

bots/sustainabot/bot-integration/src/Report.affine

@@ -91,7 +91,7 @@ pub fn generate_pr_comment(analysis: ref AnalysisResult, mode: ref BotMode) -> S
       let top_recs = Array::slice(analysis.recommendations, 0, max_recs);
 
       let rec_lines = map(top_recs, fn(r) -> String {
-        let confidence = Float::to_int(r.confidence *. 100.0);
+        let confidence = Float::to_int(r.confidence * 100.0);
         "- **" ++ r.action ++ "** (" ++ Int::to_string(confidence)
           ++ "% confidence): " ++ r.reason ++ "\n"
       });

bots/sustainabot/bot-integration/src/Router.affine

@@ -125,11 +125,11 @@ pub fn not_found(router: Router, handler: Handler) -> Router {
   Router #{ ..router, notFoundHandler: Some(handler) }
 }
 
-// `handle` walks routes to find a method+path match and invokes its
+// `dispatch` walks routes to find a method+path match and invokes its
 // handler under the middleware chain. The mechanical migrator must
 // re-express this once the canonical Http::Request shape and
 // Array::iter / Array::fold_right externs are bound.
-pub fn handle(router: ref Router, req: Http::Request) -{IO}-> Http::Response {
+pub fn dispatch(router: ref Router, req: Http::Request) -{IO}-> Http::Response {
   // TODO(mechanical-migrator): re-implement against canonical Http::Request
   // shape. Stubbed to a 501 so the file parses.
   Http::not_implemented(req)