feat: fixed router registry entry point bug

[Jayydy]

Pull Request

What changed

Here's a summary of what was changed and why each decision was made:

contracts/router-registry/src/lib.rs

Added two constants after MAX_CONSTRAINT_LEN, matching router-core exactly:

const INSTANCE_TTL_THRESHOLD: u32 = 17280 * 30; // ~30 days
const INSTANCE_TTL_EXTEND_TO: u32 = 17280 * 60; // ~60 days

Added router_common::extend_instance_ttl(&env, INSTANCE_TTL_THRESHOLD,
INSTANCE_TTL_EXTEND_TO); to all 16 public entry points: initialize, register,
register_with_check, bulk_register, get, is_deprecated, get_latest,
get_latest_with_constraint, deprecate, deprecate_all_versions, deprecate_many,
transfer_admin, admin, versions, get_all_versions, get_all_names,
get_entry_by_address.

The call is placed after require_auth() (so unauthorized callers don't extend
TTL) but before the admin check — consistent with how router-core handles it.
For read-only entry points that have no auth, it's the very first line.

One design note on is_deprecated: it was previously delegating to get(), which
would now create a double TTL bump. I inlined the storage read directly so
each entry point only bumps once.

contracts/router-common/src/lib.rs

Removed a pre-existing duplicate EVENT_ROLE_LIMITS_SET constant at line 245
that was causing a compile error (E0428: defined multiple times). The first
definition at line 62 has the more precise doc comment ("Emitted when the
super-admin changes the role-system limits") and was kept

How it was tested

Follow-up work

Checklist

• [x ] Branch follows naming convention (feat/, fix/, docs/, etc.)
• [ x] Tests added or updated
• [ x] Tests pass locally (cargo test)
• [x ] Code formatted (cargo fmt)
• [ x] No clippy warnings (cargo clippy -- -D warnings)
• [x ] PR title follows conventional commit format (type(scope): description)

Related Issues

Closes #1173

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