[codegen] annotate call/method-call/ternary with class/interface result types

[cs01]

Before

`foo()`, `obj.m()`, and `a ? b : c` expressions weren't cached in typeOf even when their result type was a concrete class/interface.

After

All three kinds are cached when the resolved result type is class/interface.

Description

Bundled steps 5-7 of #658 into one PR since they share the mechanical pattern (delegate to `resolveExpressionTypeRich`, filter by same class/interface source-kind as steps 1-4). With this, all seven candidate kinds from the audit are wired:

1. variable ([codegen] annotate variable reads bound to class-typed parameters #660 merged, [codegen] widen variable annotation to interface-typed parameters #661 merged)
2. member_access ([codegen] annotate member-access expressions with class/interface types #662)
3. binary/unary ([codegen] annotate binary/unary expressions with class/interface result types #663)
4. index_access ([codegen] annotate index-access expressions with class/interface element types #664)
5. call
6. method_call
7. conditional (ternary)

Verification

• `npm run verify` (Stage 0 + Stage 1 + Stage 2 self-hosting + full test suite): PASSED

Refs #658.

[github-actions]

Benchmark Results (Linux x86-64)

Benchmark	C	ChadScript	Go	Node	Place
Cold Start	0.8ms	0.6ms	1.0ms	24.2ms	🥇
Fibonacci	0.724s	0.721s	1.428s	2.835s	🥇
Hash Map Lookup	0.093s	0.062s	0.089s	0.117s	🥇
Monte Carlo Pi	0.400s	0.381s	0.405s	1.473s	🥇
Regex Match	0.013s	0.004s	0.020s	0.004s	🥇
JSON Parse/Stringify	0.031s	0.044s	0.166s	0.123s	🥈
Matrix Multiply	0.396s	0.415s	0.421s	0.424s	🥈
N-Body Simulation	1.451s	1.849s	1.949s	2.275s	🥈
SQLite	0.046s	0.328s	0.464s	0.411s	🥈
Binary Trees	1.244s	1.292s	2.896s	1.215s	🥉
File I/O	0.072s	0.073s	0.070s	0.214s	🥉
Quicksort	0.169s	0.215s	0.182s	0.247s	🥉
Sieve of Eratosthenes	0.027s	0.038s	0.034s	0.053s	🥉
String Manipulation	0.008s	0.016s	0.016s	0.035s	🥉

CLI Tool Benchmarks

Benchmark	ChadScript	grep	node	xxd	Place
Hex Dump	0.469s	—	0.929s	0.068s	🥈
Recursive Grep	0.012s	0.007s	0.101s	—	🥈

[cs01]

Closing — same x86-64 Stage 0→1 self-hosting segfault as #662 (reverted in #666). See #663 close comment.