Approximate-location map on aggregated listings (Divar coords)

We captured Divar's privacy-fuzzed coords on RawListing but discarded them for
the listings that need them: unnamed-facility shifts/jobs dropped them (to avoid
piling on the shared placeholder) and applicants had no coordinate field at all.

- Add Lat/Lng to Shift, JobOpening, TalentListing (migration ListingApproxCoords).
- Publish stores the source ad's approx coords on each aggregated listing.
- Detail pages render the map from the listing's own coords (fallback: facility),
  and aggregated coords show as a shaded «محدودهٔ تقریبی» circle (not a precise
  pin) via _NeshanMap data-approx, with a disclaimer. Applicants get a map card
  (they had none) + the page now loads the Neshan key.

Only Divar provides coords; the map needs NeshanMapKey set in admin settings.
Existing rows get coords once reprocessed (RawListing already has them).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/JobsMedical.Web/Migrations/AppDbContextModelSnapshot.cs

@@ -664,6 +664,12 @@ namespace JobsMedical.Web.Migrations
                     b.Property<int>("GenderRequirement")
                         .HasColumnType("integer");
 
+                    b.Property<double?>("Lat")
+                        .HasColumnType("double precision");
+
+                    b.Property<double?>("Lng")
+                        .HasColumnType("double precision");
+
                     b.Property<string>("Requirements")
                         .HasMaxLength(1000)
                         .HasColumnType("character varying(1000)");
@@ -942,6 +948,12 @@ namespace JobsMedical.Web.Migrations
                     b.Property<int>("GenderRequirement")
                         .HasColumnType("integer");
 
+                    b.Property<double?>("Lat")
+                        .HasColumnType("double precision");
+
+                    b.Property<double?>("Lng")
+                        .HasColumnType("double precision");
+
                     b.Property<long?>("PayAmount")
                         .HasColumnType("bigint");
 
@@ -1020,6 +1032,12 @@ namespace JobsMedical.Web.Migrations
                     b.Property<bool>("IsLicensed")
                         .HasColumnType("boolean");
 
+                    b.Property<double?>("Lat")
+                        .HasColumnType("double precision");
+
+                    b.Property<double?>("Lng")
+                        .HasColumnType("double precision");
+
                     b.Property<long?>("PayAmount")
                         .HasColumnType("bigint");